Japan System Techniques

4323.TTSE PRIMEInformation & Communication

Filed as Japan System Techniques Co., Ltd. (2022-06–2026-07)

Major holders (5%+) · 2

Holder	Stake	Change	Filed
MIRI Capital Management LLC	29.31%	+1.03pp	2026-02-12
JUST Co., Ltd.	23.35%	0.00pp	2026-04-22

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

Former and minor holders (below 5%) · 5

Hirabayashi Taku	2.26%	2026-04-22
Hirabayashi Takeaki	1.98%	2026-04-22
Hirabayashi Dai	0.97%	2026-04-22
Hirabayashi Emiko	0.24%	2026-04-22
Hirabayashi Mami	0.00%	2026-04-22

Ownership history · 23

Filed	Holder	Ratio	Change	Purpose
2026-04-22Amended	Hirabayashi Mami2026-04-22 · amended	0.00%	no change	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Emiko2026-04-22 · amended	0.24%	no change	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Dai2026-04-22 · amended	0.97%	no change	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Takeaki2026-04-22 · amended	1.98%	+0.02pp	Participation in management
2026-04-22Amended	Hirabayashi Taku2026-04-22 · amended	2.26%	+0.01pp	Stable shareholder; Long-term holding
2026-04-22Amended	JUST Co., Ltd.2026-04-22 · amended	23.35%	no change	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Mami2026-04-22 · amended	0.00%	no change	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Emiko2026-04-22 · amended	0.24%	no change	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Dai2026-04-22 · amended	0.97%	+0.01pp	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Takeaki2026-04-22 · amended	1.96%	+0.41pp	Participation in management
2026-04-22Amended	Hirabayashi Taku2026-04-22 · amended	2.25%	+0.01pp	Stable shareholder; Long-term holding
2026-04-22Amended	JUST Co., Ltd.2026-04-22 · amended	23.35%	no change	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Mami2026-04-22 · amended	0.00%	new	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Emiko2026-04-22 · amended	0.24%	new	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Dai2026-04-22 · amended	0.96%	new	Stable shareholder; Long-term holding
2026-04-22Amended	Hirabayashi Takeaki2026-04-22 · amended	1.55%	new	Participation in management
2026-04-22Amended	Hirabayashi Taku2026-04-22 · amended	2.24%	new	Stable shareholder; Long-term holding
2026-04-22Amended	JUST Co., Ltd.2026-04-22 · amended	23.35%	new	Stable shareholder; Long-term holding
2026-02-12Amended	MIRI Capital Management LLC2026-02-12 · amended	29.31%	+1.03pp	Material proposals to management (activist); Held for clients (discretionary / trust); Asset management / investment
2025-12-18Amended	MIRI Capital Management LLC2025-12-18 · amended	28.28%	+1.01pp	Material proposals to management (activist); Held for clients (discretionary / trust); Asset management / investment

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