Annual report
1514.TEDINET S100R87R
Period2022-04-01 → 2023-03-31
Filed2023-06-29
StandardJapan GAAP
ConsolidatedYes
Data checks24 of 24 passed
Key figures · 157
| Metric | Value | Period | Scope | Source row |
|---|---|---|---|---|
| Revenue | ¥39.9bn | 2022-04-01 → 2023-03-31 | Cons. | Net sales |
| Revenue | ¥12.4bn | 2021-04-01 → 2022-03-31 | Cons. | Net sales |
| Revenue | ¥9.8bn | 2020-04-01 → 2021-03-31d | Cons. | Net sales (5-year summary) |
| Revenue | ¥16.7bn | 2019-04-01 → 2020-03-31d | Cons. | Net sales (5-year summary) |
| Revenue | ¥21.7bn | 2018-04-01 → 2019-03-31d | Cons. | Net sales (5-year summary) |
| Operating income | ¥3.8bn | 2022-04-01 → 2023-03-31 | Cons. | Operating income |
| Operating income | ¥2.3bn | 2021-04-01 → 2022-03-31 | Cons. | Operating income |
| Ordinary income | ¥3.7bn | 2022-04-01 → 2023-03-31 | Cons. | Ordinary income |
| Ordinary income | ¥2.4bn | 2021-04-01 → 2022-03-31 | Cons. | Ordinary income |
| Ordinary income | −¥34m | 2020-04-01 → 2021-03-31d | Cons. | Ordinary income loss (5-year summary) |
| Ordinary income | ¥1.3bn | 2019-04-01 → 2020-03-31d | Cons. | Ordinary income loss (5-year summary) |
| Ordinary income | ¥2.1bn | 2018-04-01 → 2019-03-31d | Cons. | Ordinary income loss (5-year summary) |
| Profit before tax | ¥3.7bn | 2022-04-01 → 2023-03-31 | Cons. | Income before income taxes |
| Profit before tax | ¥2.3bn | 2021-04-01 → 2022-03-31 | Cons. | Income before income taxes |
| Net income (owners) | ¥3.7bn | 2022-04-01 → 2023-03-31 | Cons. | Profit loss attributable to owners of parent |
| Net income (owners) | ¥2.3bn | 2021-04-01 → 2022-03-31 | Cons. | Profit loss attributable to owners of parent |
| Net income (owners) | −¥94m | 2020-04-01 → 2021-03-31d | Cons. | Profit loss attributable to owners of parent (5-year summary) |
| Net income (owners) | ¥1.0bn | 2019-04-01 → 2020-03-31d | Cons. | Profit loss attributable to owners of parent (5-year summary) |
| Net income (owners) | ¥2.6bn | 2018-04-01 → 2019-03-31d | Cons. | Profit loss attributable to owners of parent (5-year summary) |
| Net income | ¥3.7bn | 2022-04-01 → 2023-03-31 | Cons. | Profit loss |
| Net income | ¥2.3bn | 2021-04-01 → 2022-03-31 | Cons. | Profit loss |
| Total assets | ¥26.1bn | at 2023-03-31 | Cons. | Assets |
| Total assets | ¥21.6bn | at 2022-03-31 | Cons. | Assets |
| Total assets | ¥17.1bn | at 2021-03-31d | Cons. | Total assets (5-year summary) |
| Total assets | ¥16.6bn | at 2020-03-31d | Cons. | Total assets (5-year summary) |
| Total assets | ¥16.8bn | at 2019-03-31d | Cons. | Total assets (5-year summary) |
| Total liabilities | ¥5.8bn | at 2023-03-31 | Cons. | Liabilities |
| Total liabilities | ¥4.2bn | at 2022-03-31 | Cons. | Liabilities |
| Net assets / equity | ¥20.4bn | at 2023-03-31 | Cons. | Net assets |
| Net assets / equity | ¥17.4bn | at 2022-03-31 | Cons. | Net assets |
| Net assets / equity | ¥15.1bn | at 2021-03-31d | Cons. | Net assets |
| Net assets / equity | ¥15.0bn | at 2020-03-31d | Cons. | Net assets (5-year summary) |
| Net assets / equity | ¥14.5bn | at 2019-03-31d | Cons. | Net assets (5-year summary) |
| Cash and deposits | ¥3.9bn | at 2023-03-31 | Cons. | Cash and deposits |
| Cash and deposits | ¥3.4bn | at 2022-03-31 | Cons. | Cash and deposits |
| Cash & equivalents | ¥3.9bn | at 2023-03-31 | Cons. | Cash and cash equivalents |
| Cash & equivalents | ¥3.4bn | at 2022-03-31 | Cons. | Cash and cash equivalents |
| Cash & equivalents | ¥4.6bn | at 2021-03-31d | Cons. | Cash and cash equivalents |
| Cash & equivalents | ¥3.5bn | at 2020-03-31d | Cons. | Cash and cash equivalents (5-year summary) |
| Cash & equivalents | ¥2.1bn | at 2019-03-31d | Cons. | Cash and cash equivalents (5-year summary) |
| Operating cash flow | ¥53m | 2022-04-01 → 2023-03-31 | Cons. | Net cash provided by used in operating activities |
| Operating cash flow | −¥3.0bn | 2021-04-01 → 2022-03-31 | Cons. | Net cash provided by used in operating activities |
| Operating cash flow | ¥1.5bn | 2020-04-01 → 2021-03-31d | Cons. | Net cash provided by used in operating activities (5-year summary) |
| Operating cash flow | ¥2.2bn | 2019-04-01 → 2020-03-31d | Cons. | Net cash provided by used in operating activities (5-year summary) |
| Operating cash flow | −¥2.1bn | 2018-04-01 → 2019-03-31d | Cons. | Net cash provided by used in operating activities (5-year summary) |
| Investing cash flow | −¥22m | 2022-04-01 → 2023-03-31 | Cons. | Net cash provided by used in investment activities |
| Investing cash flow | ¥445m | 2021-04-01 → 2022-03-31 | Cons. | Net cash provided by used in investment activities |
| Investing cash flow | −¥37m | 2020-04-01 → 2021-03-31d | Cons. | Net cash provided by used in investing activities (5-year summary) |
| Investing cash flow | −¥55m | 2019-04-01 → 2020-03-31d | Cons. | Net cash provided by used in investing activities (5-year summary) |
| Investing cash flow | ¥1.4bn | 2018-04-01 → 2019-03-31d | Cons. | Net cash provided by used in investing activities (5-year summary) |
| Financing cash flow | ¥504m | 2022-04-01 → 2023-03-31 | Cons. | Net cash provided by used in financing activities |
| Financing cash flow | ¥1.4bn | 2021-04-01 → 2022-03-31 | Cons. | Net cash provided by used in financing activities |
| Financing cash flow | −¥300m | 2020-04-01 → 2021-03-31d | Cons. | Net cash provided by used in financing activities (5-year summary) |
| Financing cash flow | −¥731m | 2019-04-01 → 2020-03-31d | Cons. | Net cash provided by used in financing activities (5-year summary) |
| Financing cash flow | −¥2.5bn | 2018-04-01 → 2019-03-31d | Cons. | Net cash provided by used in financing activities (5-year summary) |
| EPS (basic) | ¥68.31 | 2022-04-01 → 2023-03-31 | Cons. | Basic earnings loss per share (5-year summary) |
| EPS (basic) | ¥41.02 | 2021-04-01 → 2022-03-31 | Cons. | Basic earnings loss per share (5-year summary) |
| EPS (basic) | ¥-2 | 2020-04-01 → 2021-03-31d | Cons. | Basic earnings loss per share (5-year summary) |
| EPS (basic) | ¥18.95 | 2019-04-01 → 2020-03-31d | Cons. | Basic earnings loss per share (5-year summary) |
| EPS (basic) | ¥47.23 | 2018-04-01 → 2019-03-31d | Cons. | Basic earnings loss per share (5-year summary) |
| EPS (diluted) | ¥59.33 | 2022-04-01 → 2023-03-31 | Cons. | Diluted earnings per share (5-year summary) |
| EPS (diluted) | ¥35.85 | 2021-04-01 → 2022-03-31 | Cons. | Diluted earnings per share (5-year summary) |
| EPS (diluted) | ¥15.99 | 2019-04-01 → 2020-03-31d | Cons. | Diluted earnings per share (5-year summary) |
| EPS (diluted) | ¥40.25 | 2018-04-01 → 2019-03-31d | Cons. | Diluted earnings per share (5-year summary) |
| Net assets per share | ¥335.34 | at 2023-03-31 | Cons. | Net assets per share (5-year summary) |
| Net assets per share | ¥269.67 | at 2022-03-31 | Cons. | Net assets per share (5-year summary) |
| Net assets per share | ¥230.12 | at 2021-03-31d | Cons. | Net assets per share (5-year summary) |
| Net assets per share | ¥233.57 | at 2020-03-31d | Cons. | Net assets per share (5-year summary) |
| Net assets per share | ¥218.6 | at 2019-03-31d | Cons. | Net assets per share (5-year summary) |
| Equity ratio | 77.9% | at 2023-03-31 | Cons. | Equity to asset ratio (5-year summary) |
| Equity ratio | 80.4% | at 2022-03-31 | Cons. | Equity to asset ratio (5-year summary) |
| Equity ratio | 88.6% | at 2021-03-31d | Cons. | Equity to asset ratio (5-year summary) |
| Equity ratio | 89.4% | at 2020-03-31d | Cons. | Equity to asset ratio (5-year summary) |
| Equity ratio | 85.5% | at 2019-03-31d | Cons. | Equity to asset ratio (5-year summary) |
| ROE | 19.4% | 2022-04-01 → 2023-03-31 | Cons. | Rate of return on equity (5-year summary) |
| ROE | 14.0% | 2021-04-01 → 2022-03-31 | Cons. | Rate of return on equity (5-year summary) |
| ROE | -0.6% | 2020-04-01 → 2021-03-31d | Cons. | Rate of return on equity (5-year summary) |
| ROE | 7.0% | 2019-04-01 → 2020-03-31d | Cons. | Rate of return on equity (5-year summary) |
| ROE | 19.1% | 2018-04-01 → 2019-03-31d | Cons. | Rate of return on equity (5-year summary) |
| Employees | 45 | at 2023-03-31 | Cons. | Number of employees |
| Employees | 45 | at 2022-03-31 | Cons. | Number of employees |
| Employees | 57 | at 2021-03-31d | Cons. | Number of employees |
| Employees | 58 | at 2020-03-31d | Cons. | Number of employees |
| Employees | 56 | at 2019-03-31d | Cons. | Number of employees |
| Revenue | ¥203m | 2022-04-01 → 2023-03-31 | Standalone | Net sales |
| Revenue | ¥208m | 2021-04-01 → 2022-03-31 | Standalone | Net sales |
| Revenue | ¥230m | 2020-04-01 → 2021-03-31d | Standalone | Net sales (5-year summary) |
| Revenue | ¥220m | 2019-04-01 → 2020-03-31d | Standalone | Net sales (5-year summary) |
| Revenue | ¥200m | 2018-04-01 → 2019-03-31d | Standalone | Net sales (5-year summary) |
| Operating income | −¥223m | 2022-04-01 → 2023-03-31 | Standalone | Operating income |
| Operating income | −¥169m | 2021-04-01 → 2022-03-31 | Standalone | Operating income |
| Ordinary income | ¥2.0bn | 2022-04-01 → 2023-03-31 | Standalone | Ordinary income |
| Ordinary income | ¥72m | 2021-04-01 → 2022-03-31 | Standalone | Ordinary income |
| Ordinary income | ¥2.5bn | 2020-04-01 → 2021-03-31d | Standalone | Ordinary income loss (5-year summary) |
| Ordinary income | ¥1.3bn | 2019-04-01 → 2020-03-31d | Standalone | Ordinary income loss (5-year summary) |
| Ordinary income | ¥2.6bn | 2018-04-01 → 2019-03-31d | Standalone | Ordinary income loss (5-year summary) |
| Profit before tax | ¥2.0bn | 2022-04-01 → 2023-03-31 | Standalone | Income before income taxes |
| Profit before tax | ¥375m | 2021-04-01 → 2022-03-31 | Standalone | Income before income taxes |
| Net income | ¥2.1bn | 2022-04-01 → 2023-03-31 | Standalone | Profit loss |
| Net income | ¥407m | 2021-04-01 → 2022-03-31 | Standalone | Profit loss |
| Net income | ¥2.6bn | 2020-04-01 → 2021-03-31d | Standalone | Net income loss (5-year summary) |
| Net income | ¥1.3bn | 2019-04-01 → 2020-03-31d | Standalone | Net income loss (5-year summary) |
| Net income | ¥2.6bn | 2018-04-01 → 2019-03-31d | Standalone | Net income loss (5-year summary) |
| Total assets | ¥16.5bn | at 2023-03-31 | Standalone | Assets |
| Total assets | ¥11.5bn | at 2022-03-31 | Standalone | Assets |
| Total assets | ¥11.2bn | at 2021-03-31d | Standalone | Total assets (5-year summary) |
| Total assets | ¥8.7bn | at 2020-03-31d | Standalone | Total assets (5-year summary) |
| Total assets | ¥8.0bn | at 2019-03-31d | Standalone | Total assets (5-year summary) |
| Total liabilities | ¥3.8bn | at 2023-03-31 | Standalone | Liabilities |
| Total liabilities | ¥145m | at 2022-03-31 | Standalone | Liabilities |
| Net assets / equity | ¥12.8bn | at 2023-03-31 | Standalone | Net assets |
| Net assets / equity | ¥11.3bn | at 2022-03-31 | Standalone | Net assets |
| Net assets / equity | ¥11.1bn | at 2021-03-31d | Standalone | Net assets |
| Net assets / equity | ¥8.6bn | at 2020-03-31d | Standalone | Net assets (5-year summary) |
| Net assets / equity | ¥7.6bn | at 2019-03-31d | Standalone | Net assets (5-year summary) |
| Cash and deposits | ¥738m | at 2023-03-31 | Standalone | Cash and deposits |
| Cash and deposits | ¥958m | at 2022-03-31 | Standalone | Cash and deposits |
| EPS (basic) | ¥38.49 | 2022-04-01 → 2023-03-31 | Standalone | Basic earnings loss per share (5-year summary) |
| EPS (basic) | ¥7.16 | 2021-04-01 → 2022-03-31 | Standalone | Basic earnings loss per share (5-year summary) |
| EPS (basic) | ¥47.03 | 2020-04-01 → 2021-03-31d | Standalone | Basic earnings loss per share (5-year summary) |
| EPS (basic) | ¥24.8 | 2019-04-01 → 2020-03-31d | Standalone | Basic earnings loss per share (5-year summary) |
| EPS (basic) | ¥47.2 | 2018-04-01 → 2019-03-31d | Standalone | Basic earnings loss per share (5-year summary) |
| EPS (diluted) | ¥33.53 | 2022-04-01 → 2023-03-31 | Standalone | Diluted earnings per share (5-year summary) |
| EPS (diluted) | ¥6.44 | 2021-04-01 → 2022-03-31 | Standalone | Diluted earnings per share (5-year summary) |
| EPS (diluted) | ¥40.76 | 2020-04-01 → 2021-03-31d | Standalone | Diluted earnings per share (5-year summary) |
| EPS (diluted) | ¥20.92 | 2019-04-01 → 2020-03-31d | Standalone | Diluted earnings per share (5-year summary) |
| EPS (diluted) | ¥40.22 | 2018-04-01 → 2019-03-31d | Standalone | Diluted earnings per share (5-year summary) |
| Dividend per share | ¥7.5 | 2022-04-01 → 2023-03-31 | Standalone | Dividend paid per share (5-year summary) |
| Dividend per share | ¥5 | 2021-04-01 → 2022-03-31 | Standalone | Dividend paid per share (5-year summary) |
| Dividend per share | ¥3 | 2020-04-01 → 2021-03-31d | Standalone | Dividend paid per share (5-year summary) |
| Dividend per share | ¥3 | 2019-04-01 → 2020-03-31d | Standalone | Dividend paid per share (5-year summary) |
| Dividend per share | ¥3 | 2018-04-01 → 2019-03-31d | Standalone | Dividend paid per share (5-year summary) |
| Net assets per share | ¥192.69 | at 2023-03-31 | Standalone | Net assets per share (5-year summary) |
| Net assets per share | ¥160.06 | at 2022-03-31 | Standalone | Net assets per share (5-year summary) |
| Net assets per share | ¥156.03 | at 2021-03-31d | Standalone | Net assets per share (5-year summary) |
| Net assets per share | ¥112.34 | at 2020-03-31d | Standalone | Net assets per share (5-year summary) |
| Net assets per share | ¥91.21 | at 2019-03-31d | Standalone | Net assets per share (5-year summary) |
| Equity ratio | 77.3% | at 2023-03-31 | Standalone | Equity to asset ratio (5-year summary) |
| Equity ratio | 98.7% | at 2022-03-31 | Standalone | Equity to asset ratio (5-year summary) |
| Equity ratio | 99.0% | at 2021-03-31d | Standalone | Equity to asset ratio (5-year summary) |
| Equity ratio | 96.6% | at 2020-03-31d | Standalone | Equity to asset ratio (5-year summary) |
| Equity ratio | 93.0% | at 2019-03-31d | Standalone | Equity to asset ratio (5-year summary) |
| ROE | 17.2% | 2022-04-01 → 2023-03-31 | Standalone | Rate of return on equity (5-year summary) |
| ROE | 3.6% | 2021-04-01 → 2022-03-31 | Standalone | Rate of return on equity (5-year summary) |
| ROE | 26.3% | 2020-04-01 → 2021-03-31d | Standalone | Rate of return on equity (5-year summary) |
| ROE | 16.7% | 2019-04-01 → 2020-03-31d | Standalone | Rate of return on equity (5-year summary) |
| ROE | 40.6% | 2018-04-01 → 2019-03-31d | Standalone | Rate of return on equity (5-year summary) |
| Shares issued | 58,892,853 | at 2023-03-31 | Standalone | Total number of issued shares (5-year summary) |
| Shares issued | 58,892,853 | at 2022-03-31 | Standalone | Total number of issued shares (5-year summary) |
| Shares issued | 58,892,853 | at 2021-03-31d | Standalone | Total number of issued shares (5-year summary) |
| Shares issued | 58,892,853 | at 2020-03-31d | Standalone | Total number of issued shares (5-year summary) |
| Shares issued | 58,892,853 | at 2019-03-31d | Standalone | Total number of issued shares (5-year summary) |
| Employees | 15 | at 2023-03-31 | Standalone | Number of employees |
| Employees | 12 | at 2022-03-31 | Standalone | Number of employees |
| Employees | 12 | at 2021-03-31d | Standalone | Number of employees |
| Employees | 12 | at 2020-03-31d | Standalone | Number of employees |
| Employees | 12 | at 2019-03-31d | Standalone | Number of employees |
Periods use the dates stated in the filing. d = earlier-year period dated by calendar; v = that date confirmed by the company's own earlier filing.
Segments · 51
| Segment | Item | Period | Value |
|---|---|---|---|
| Coal Business Divisionreportable segment | capex | 2022-04-01 → 2023-03-31 | ¥2m |
| Coal Business Divisionreportable segment | depreciation | 2022-04-01 → 2023-03-31 | ¥45m |
| Coal Business Divisionreportable segment | employees | at 2023-03-31 | 9 pure |
| Coal Business Divisionreportable segment | revenue | 2022-04-01 → 2023-03-31 | ¥39.2bn |
| Coal Business Divisionreportable segment | revenue external | 2022-04-01 → 2023-03-31 | ¥39.2bn |
| Coal Business Divisionreportable segment | segment assets | at 2023-03-31 | ¥13.8bn |
| Coal Business Divisionreportable segment | segment ordinary income | 2022-04-01 → 2023-03-31 | ¥4.1bn |
| New Materials Divisionreportable segment | capex | 2022-04-01 → 2023-03-31 | ¥0 |
| New Materials Divisionreportable segment | depreciation | 2022-04-01 → 2023-03-31 | ¥8m |
| New Materials Divisionreportable segment | employees | at 2023-03-31 | 7 pure |
| New Materials Divisionreportable segment | revenue | 2022-04-01 → 2023-03-31 | ¥308m |
| New Materials Divisionreportable segment | revenue external | 2022-04-01 → 2023-03-31 | ¥308m |
| New Materials Divisionreportable segment | segment assets | at 2023-03-31 | ¥264m |
| New Materials Divisionreportable segment | segment ordinary income | 2022-04-01 → 2023-03-31 | ¥75m |
| Quarrying Business Divisionreportable segment | capex | 2022-04-01 → 2023-03-31 | ¥36m |
| Quarrying Business Divisionreportable segment | depreciation | 2022-04-01 → 2023-03-31 | ¥48m |
| Quarrying Business Divisionreportable segment | employees | at 2023-03-31 | 14 pure |
| Quarrying Business Divisionreportable segment | revenue | 2022-04-01 → 2023-03-31 | ¥373m |
| Quarrying Business Divisionreportable segment | revenue external | 2022-04-01 → 2023-03-31 | ¥373m |
| Quarrying Business Divisionreportable segment | segment assets | at 2023-03-31 | ¥362m |
| Quarrying Business Divisionreportable segment | segment ordinary income | 2022-04-01 → 2023-03-31 | ¥31m |
| —segment total | employees | at 2023-03-31 | 30 pure |
| Total Of Reportable Segments And Otherssegment total | capex | 2022-04-01 → 2023-03-31 | ¥39m |
| Total Of Reportable Segments And Otherssegment total | depreciation | 2022-04-01 → 2023-03-31 | ¥100m |
| Total Of Reportable Segments And Otherssegment total | revenue | 2022-04-01 → 2023-03-31 | ¥39.9bn |
| Total Of Reportable Segments And Otherssegment total | revenue external | 2022-04-01 → 2023-03-31 | ¥39.9bn |
| Total Of Reportable Segments And Otherssegment total | segment assets | at 2023-03-31 | ¥14.4bn |
| Total Of Reportable Segments And Otherssegment total | segment ordinary income | 2022-04-01 → 2023-03-31 | ¥4.2bn |
| Coal Business Divisionreportable segment | depreciation | 2021-04-01 → 2022-03-31 | ¥46m |
| Coal Business Divisionreportable segment | revenue | 2021-04-01 → 2022-03-31 | ¥11.7bn |
| Coal Business Divisionreportable segment | revenue external | 2021-04-01 → 2022-03-31 | ¥11.7bn |
| Coal Business Divisionreportable segment | segment assets | at 2022-03-31 | ¥9.6bn |
| Coal Business Divisionreportable segment | segment ordinary income | 2021-04-01 → 2022-03-31 | ¥2.6bn |
| New Materials Divisionreportable segment | capex | 2021-04-01 → 2022-03-31 | ¥0 |
| New Materials Divisionreportable segment | depreciation | 2021-04-01 → 2022-03-31 | ¥9m |
| New Materials Divisionreportable segment | revenue | 2021-04-01 → 2022-03-31 | ¥361m |
| New Materials Divisionreportable segment | revenue external | 2021-04-01 → 2022-03-31 | ¥361m |
| New Materials Divisionreportable segment | segment assets | at 2022-03-31 | ¥360m |
| New Materials Divisionreportable segment | segment ordinary income | 2021-04-01 → 2022-03-31 | ¥90m |
| Quarrying Business Divisionreportable segment | capex | 2021-04-01 → 2022-03-31 | ¥33m |
| Quarrying Business Divisionreportable segment | depreciation | 2021-04-01 → 2022-03-31 | ¥44m |
| Quarrying Business Divisionreportable segment | revenue | 2021-04-01 → 2022-03-31 | ¥323m |
| Quarrying Business Divisionreportable segment | revenue external | 2021-04-01 → 2022-03-31 | ¥323m |
| Quarrying Business Divisionreportable segment | segment assets | at 2022-03-31 | ¥371m |
| Quarrying Business Divisionreportable segment | segment ordinary income | 2021-04-01 → 2022-03-31 | ¥36m |
| Total Of Reportable Segments And Otherssegment total | capex | 2021-04-01 → 2022-03-31 | ¥33m |
| Total Of Reportable Segments And Otherssegment total | depreciation | 2021-04-01 → 2022-03-31 | ¥99m |
| Total Of Reportable Segments And Otherssegment total | revenue | 2021-04-01 → 2022-03-31 | ¥12.4bn |
| Total Of Reportable Segments And Otherssegment total | revenue external | 2021-04-01 → 2022-03-31 | ¥12.4bn |
| Total Of Reportable Segments And Otherssegment total | segment assets | at 2022-03-31 | ¥10.4bn |
| Total Of Reportable Segments And Otherssegment total | segment ordinary income | 2021-04-01 → 2022-03-31 | ¥2.8bn |
Segment names come from EDINET member IDs; not yet mapped to a common taxonomy.
All source rows · 1,426
| Item | Context | Value | Unit |
|---|---|---|---|
| Payout ratio (5-year summary) | Prior3YearDuration_NonConsolidatedMember | 0.121 | |
| Payout ratio (5-year summary) | Prior2YearDuration_NonConsolidatedMember | 0.064 | |
| Payout ratio (5-year summary) | Prior1YearDuration_NonConsolidatedMember | 0.699 | |
| Payout ratio (5-year summary) | CurrentYearDuration_NonConsolidatedMember | 0.195 | |
| Number of employees | Prior4YearInstant_NonConsolidatedMember | 12 | |
| Number of employees | Prior3YearInstant_NonConsolidatedMember | 12 | |
| Number of employees | Prior2YearInstant_NonConsolidatedMember | 12 | |
| Number of employees | Prior1YearInstant_NonConsolidatedMember | 12 | |
| Number of employees | CurrentYearInstant_NonConsolidatedMember | 15 | |
| Average number of temporary workers | Prior4YearInstant_NonConsolidatedMember | － | |
| Average number of temporary workers | Prior3YearInstant_NonConsolidatedMember | － | |
| Average number of temporary workers | Prior2YearInstant_NonConsolidatedMember | － | |
| Average number of temporary workers | Prior1YearInstant_NonConsolidatedMember | － | |
| Average number of temporary workers | CurrentYearInstant_NonConsolidatedMember | － | |
| Total shareholder return | Prior4YearInstant_NonConsolidatedMember | 0.813 | |
| Total shareholder return | Prior3YearInstant_NonConsolidatedMember | 0.763 | |
| Total shareholder return | Prior2YearInstant_NonConsolidatedMember | 0.825 | |
| Total shareholder return | Prior1YearInstant_NonConsolidatedMember | 1.144 | |
| Total shareholder return | CurrentYearInstant_NonConsolidatedMember | 2.759 | |
| Total return on share price index | Prior4YearInstant_NonConsolidatedMember | 0.950 | |
| Total return on share price index | Prior3YearInstant_NonConsolidatedMember | 0.859 | |
| Total return on share price index | Prior2YearInstant_NonConsolidatedMember | 1.221 | |
| Total return on share price index | Prior1YearInstant_NonConsolidatedMember | 1.246 | |
| Total return on share price index | CurrentYearInstant_NonConsolidatedMember | 1.318 | |
| Number of employees | CurrentYearInstant_jpcrp030000-asr_E21342-000CoalBusinessDivisionReportableSegmentsMember | 9 | |
| Average number of temporary workers | CurrentYearInstant_jpcrp030000-asr_E21342-000CoalBusinessDivisionReportableSegmentsMember | － | |
| Number of employees | CurrentYearInstant_jpcrp030000-asr_E21342-000NewMaterialsDivisionReportableSegmentsMember | 7 | |
| Average number of temporary workers | CurrentYearInstant_jpcrp030000-asr_E21342-000NewMaterialsDivisionReportableSegmentsMember | 4 | |
| Number of employees | CurrentYearInstant_jpcrp030000-asr_E21342-000QuarryingBusinessDivisionReportableSegmentsMember | 14 | |
| Average number of temporary workers | CurrentYearInstant_jpcrp030000-asr_E21342-000QuarryingBusinessDivisionReportableSegmentsMember | － | |
| Number of employees | CurrentYearInstant_ReportableSegmentsMember | 30 | |
| Average number of temporary workers | CurrentYearInstant_ReportableSegmentsMember | 4 | |
| Number of employees | CurrentYearInstant_CorporateSharedMember | 15 | |
| Average number of temporary workers | CurrentYearInstant_CorporateSharedMember | － | |
| Number of employees | CurrentYearInstant | 45 | |
| Average number of temporary workers | CurrentYearInstant | 4 | |
| Number of employees | CurrentYearInstant_NonConsolidatedMember | 15 | |
| Average number of temporary workers | CurrentYearInstant_NonConsolidatedMember | － | |
| Average age years information about reporting company information about employees | CurrentYearInstant_NonConsolidatedMember | 50.9 | |
| Average length of service years information about reporting company information about employees | CurrentYearInstant_NonConsolidatedMember | 22.1 | |
| Average annual salary information about reporting company information about employees | CurrentYearInstant_NonConsolidatedMember | 7742360 | JPY |
| Number of employees | CurrentYearInstant_NonConsolidatedMember_CorporateSharedMember | 15 | |
| Average number of temporary workers | CurrentYearInstant_NonConsolidatedMember_CorporateSharedMember | － | |
| Number of employees | CurrentYearInstant_NonConsolidatedMember | 15 | |
| Average number of temporary workers | CurrentYearInstant_NonConsolidatedMember | － | |
| Capital expenditures overview of capital expenditures etc | CurrentYearDuration | 48000000 | JPY |
| Number of issued shares as of fiscal year end issued shares total number of shares etc | FilingDateInstant_OrdinaryShareMember | 58892853 | |
| Number of issued shares as of filing date issued shares total number of shares etc | FilingDateInstant_OrdinaryShareMember | 58892853 | |
| Number of issued shares as of fiscal year end issued shares total number of shares etc | FilingDateInstant_ClassTwoPreferredSharesMember | 7140000 | |
| Number of issued shares as of filing date issued shares total number of shares etc | FilingDateInstant_ClassTwoPreferredSharesMember | 7140000 |
Every row of the EDINET CSV. Item names are the XBRL element names; filed text is kept in its original Japanese. Filed text is available on Plus and Pro.
Data checks · 24 of 24 passed
| balance sheet identity | pass |
| balance sheet identity | pass rounding |
| balance sheet identity | pass rounding |
| balance sheet identity | pass |
| dei present | pass |
| period resolution | pass |
| statement vs summary · net assets | pass |
| statement vs summary · net assets | pass |
| statement vs summary · net assets | pass |
| statement vs summary · net assets | pass |
| statement vs summary · net assets | pass |
| statement vs summary · net assets | pass |
| statement vs summary · net income attributable to parent | pass |
| statement vs summary · net income attributable to parent | pass |
| statement vs summary · operating cash flow | pass |
| statement vs summary · operating cash flow | pass |
| statement vs summary · revenue | pass |
| statement vs summary · revenue | pass |
| statement vs summary · revenue | pass |
| statement vs summary · revenue | pass |
| statement vs summary · total assets | pass |
| statement vs summary · total assets | pass |
| statement vs summary · total assets | pass |
| statement vs summary · total assets | pass |