Who has been buying Chugokukogyo Co.,Ltd. stock?

4 distinct investors have filed 12 disclosed large-shareholding filings in Chugokukogyo Co.,Ltd. (5974), most recently on 2026-03-04. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does Chugokukogyo Co.,Ltd. have?

Chugokukogyo Co.,Ltd. has 12 buy-side and 0 sell-side disclosures on record, covering ¥734M ($4.7M) in total reported value, spanning 2025-12-15 to 2026-03-04.

Where does StockDrifts get Chugokukogyo Co.,Ltd. insider data?

From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.

Do insider buys in Japanese stocks predict returns?

Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Chugokukogyo Co.,Ltd. 5974

Company

中国工業株式会社Chugokukogyo Co.,Ltd.

Investors

Buys

Total Value

¥734M ($4.7M)

Avg Return

+11.70%

Last Filing

2026-03-04

Chugokukogyo Co.,Ltd. (5974) has 12 disclosed large-shareholding filings and 0 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥734M ($4.7M) in reported transaction value. The earliest filing StockDrifts holds for Chugokukogyo Co.,Ltd. is dated 2025-12-15; the most recent is 2026-03-04. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan). Across these filings the average return since disclosure is +11.70%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-07-16	BUY	Market Buy	佐々木耕司	passive	100.0K	¥858	-1.6%	¥86M ($554K)
2026-07-16	SELL	unknown	佐々木秀隆 (相続人佐々木耕司)	unknown	0	¥858	+1.6%	¥86M ($553K)
2026-07-16	BUY	Market Buy	日本鉱泉株式会社	passive	144.9K	¥858	-1.6%	¥2M ($15K)
2026-07-16	BUY	Market Buy	日本鉱泉株式会社	passive	144.9K	¥858	-1.6%	¥2M ($15K)
2026-07-16	BUY	Market Buy	佐々木耕司	passive	100.0K	¥858	-1.6%	¥86M ($554K)
2026-07-16	SELL	unknown	佐々木秀隆 (相続人佐々木耕司)	unknown	0	¥858	+1.6%	¥86M ($553K)
2026-06-30	BUY	Market Buy	ARNE WOLF KLAUS DEUSSEN Arne Wolf Klaus Deussen	passive	206.6K	¥854	-1.6%	¥29M ($188K)
2026-03-04	BUY	Market Buy	ARNE WOLF KLAUS DEUSSEN Arne Wolf Klaus Deussen	passive	172.2K	¥802	+9.0%	¥138M ($891K)
2026-02-24	BUY	Market Buy	佐々木秀隆	passive	100.0K	¥850	-2.8%	¥87M ($564K)
2026-02-24	BUY	Market Buy	日本鉱泉株式会社	passive	142.3K	¥850	+2.8%	¥124M ($802K)
2026-02-24	BUY	Market Buy	佐々木秀隆	passive	100.0K	¥850	-2.8%	¥87M ($564K)
2026-02-24	BUY	Market Buy	日本鉱泉株式会社	passive	142.3K	¥850	+2.8%	¥124M ($802K)
2026-01-22	BUY	Market Buy	山本裕治 Yuji Yamamoto	passive	218.2K	¥893	-2.1%	¥32M ($209K)
2026-01-13	BUY	Market Buy	山本裕治 Yuji Yamamoto	passive	182.0K	¥874	+0.0%	¥159M ($1.0M)
2026-01-07	BUY	Market Buy	佐々木秀隆	passive	100.0K	¥818	-6.8%	¥87M ($564K)
2026-01-07	BUY	Market Buy	日本鉱泉株式会社	passive	108.0K	¥818	+6.8%	¥94M ($609K)
2026-01-07	BUY	Market Buy	佐々木秀隆	passive	100.0K	¥818	+6.8%	¥87M ($564K)
2026-01-07	BUY	Market Buy	日本鉱泉株式会社	passive	108.0K	¥818	+6.8%	¥94M ($609K)
2025-12-15	BUY	Market Buy	佐々木秀隆	passive	100.0K	¥689	+26.9%	¥87M ($564K)
2025-12-15	BUY	Market Buy	日本鉱泉株式会社	passive	72.0K	¥689	+26.9%	¥63M ($406K)
2025-12-15	BUY	Market Buy	佐々木秀隆	passive	100.0K	¥689	+26.9%	¥87M ($564K)
2025-12-15	BUY	Market Buy	日本鉱泉株式会社	passive	72.0K	¥689	+26.9%	¥63M ($406K)

Frequently asked questions

Who has been buying Chugokukogyo Co.,Ltd. stock?: 4 distinct investors have filed 12 disclosed large-shareholding filings in Chugokukogyo Co.,Ltd. (5974), most recently on 2026-03-04. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does Chugokukogyo Co.,Ltd. have?: Chugokukogyo Co.,Ltd. has 12 buy-side and 0 sell-side disclosures on record, covering ¥734M ($4.7M) in total reported value, spanning 2025-12-15 to 2026-03-04.
Where does StockDrifts get Chugokukogyo Co.,Ltd. insider data?: From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.
Do insider buys in Japanese stocks predict returns?: Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Source filings

Every trade listed above is disclosed in EDINET large-shareholding (5%+) reports, filed with the Financial Services Agency (Japan). View the original EDINET filings for Chugokukogyo Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.