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Riso Kagaku

6413.TMachinery
Major holders (5%+) · 2
HolderStakeChangeFiled
RISOSHA CORPORATION13.73%0.00pp2026-01-08
AKATSUKIKOSAN CORPORATION5.44%0.00pp2026-01-08

Each holder's own ratio from its most recent large-shareholding report.

Former and minor holders (below 5%) · 4
Takashi Hayama3.18%2024-04-02
AKIRA HAYAMA2.71%2026-01-08
Showa Co., Ltd.2.19%2024-04-02
Chie Hayama0.27%2024-04-02
Ownership history · 12
FiledHolderRatioChangePurpose
2026-01-08AKIRA HAYAMA2026-01-082.71%-0.12pp—
2026-01-08AKATSUKIKOSAN CORPORATION2026-01-085.44%no changeStable shareholder
2026-01-08RISOSHA CORPORATION2026-01-0813.73%no changeStable shareholder
2024-07-19Amended-2024-07-19 · amended2.83%new—
2024-07-19Amended-2024-07-19 · amended5.44%newStable shareholder
2024-07-19Amended-2024-07-19 · amended13.73%newStable shareholder
2024-04-02AmendedChie Hayama2024-04-02 · amended0.27%no change—
2024-04-02AmendedShowa Co., Ltd.2024-04-02 · amended2.19%no change—
2024-04-02AmendedTakashi Hayama2024-04-02 · amended3.18%no change—
2024-04-02AmendedChie Hayama2024-04-02 · amended0.27%new—
2024-04-02AmendedShowa Co., Ltd.2024-04-02 · amended2.19%new—
2024-04-02AmendedTakashi Hayama2024-04-02 · amended3.18%new—

Each holder in 5% reports, joint holders included. Purpose is classified from the filed text.