Who has been buying Yamazen Corporation stock?

13 distinct investors have filed 41 disclosed large-shareholding filings in Yamazen Corporation (8051), most recently on 2026-05-12. 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 Yamazen Corporation have?

Yamazen Corporation has 41 buy-side and 39 sell-side disclosures on record, covering ¥61.8B ($398.9M) in total reported value, spanning 2021-04-22 to 2026-05-12.

Where does StockDrifts get Yamazen Corporation 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.

Yamazen Corporation 8051

Company

株式会社山善Yamazen Corporation

Investors

Buys

Total Value

¥61.8B ($398.9M)

Avg Return

+25.55%

Last Filing

2026-05-12

Yamazen Corporation (8051) has 41 disclosed large-shareholding filings and 39 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥61.8B ($398.9M) in reported transaction value. The earliest filing StockDrifts holds for Yamazen Corporation is dated 2021-04-22; the most recent is 2026-05-12. 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 +25.55%, 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
2026-05-12	BUY	Market Buy	野村アセットマネジメント株式会社	other	2.1M	¥1,544	+8.6%	¥2.1B ($13.7M)
2026-05-12	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	756.1K	¥1,544	-8.6%	¥7.9B ($51.3M)
2026-05-12	SELL	unknown	野村證券株式会社	other	3.8K	¥1,544	-8.6%	¥74M ($475K)
2026-05-12	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	unknown	0	¥1,544	+8.6%	-
2026-04-22	SELL	unknown	野村アセットマネジメント株式会社	other	714.8K	¥1,547	-10.3%	¥619M ($4.0M)
2026-04-22	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥1,547	+10.3%	-
2026-04-22	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	5.9M	¥1,547	+10.3%	¥811M ($5.2M)
2026-04-22	SELL	unknown	野村證券株式会社	other	44.1K	¥1,547	-10.3%	¥206M ($1.3M)
2026-04-07	SELL	unknown	野村アセットマネジメント株式会社	other	1.1M	¥1,583	+3.1%	¥302M ($1.9M)
2026-04-07	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥1,583	-3.1%	-
2026-04-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	5.7M	¥1,583	-3.1%	¥4.0B ($25.8M)
2026-04-07	SELL	unknown	野村證券株式会社	other	182.4K	¥1,583	+3.1%	¥4.1B ($26.6M)
2026-03-23	SELL	subscription	野村アセットマネジメント株式会社	other	1.3M	¥1,386	-13.3%	¥2.1B ($13.2M)
2026-03-23	BUY	subscription	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥1,386	-13.3%	-
2026-03-23	SELL	subscription	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	3.0M	¥1,386	-13.3%	¥4.7B ($30.6M)
2026-03-23	SELL	subscription	野村證券株式会社	other	2.9M	¥1,386	-13.3%	¥4.5B ($29.0M)
2026-03-10	BUY	subscription	エーピーピーエスフォー・インベストメント・インク(AP PS IV Investment, Inc.) AP PS IV Investment, Inc.	passive	18.1M	¥1,481	+6.1%	¥26.9B ($173.3M)
2026-03-05	BUY	unknown	野村アセットマネジメント株式会社	other	1.6M	¥1,479	+6.2%	¥2.5B ($16.0M)
2026-03-05	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥1,479	-6.2%	-
2026-03-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	3.1M	¥1,479	+6.2%	¥4.9B ($31.4M)
2026-03-05	SELL	unknown	野村證券株式会社	other	2.9M	¥1,479	-6.2%	¥4.5B ($29.1M)
2026-02-20	SELL	subscription	野村アセットマネジメント株式会社	other	482.2K	¥1,508	-4.2%	¥758M ($4.9M)
2026-02-20	BUY	subscription	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥1,508	-4.2%	-
2026-02-20	BUY	subscription	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	2.0M	¥1,508	+4.2%	¥3.1B ($19.8M)
2026-02-20	SELL	subscription	野村證券株式会社	other	5.5M	¥1,508	-4.2%	¥8.7B ($56.0M)
2025-09-29	BUY	Market Buy	株式会社エフティグループ FTGroup Co., Ltd.	passive	3.3M	¥1,397	+12.5%	¥4.6B ($29.7M)
2025-09-29	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	183.9K	¥1,397	+12.5%	¥253M ($1.6M)
2025-09-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.3M	¥1,397	+12.5%	¥479M ($3.1M)
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	6.4M	¥1,397	+12.5%	¥9.0B ($58.1M)
2025-09-22	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	491.3K	¥1,391	+12.9%	¥13M ($86K)
2025-09-22	BUY	Market Buy	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥1,391	+12.9%	-
2025-09-22	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.8M	¥1,391	-12.9%	¥265M ($1.7M)
2025-09-22	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	6.0M	¥1,391	+12.9%	¥384M ($2.5M)
2025-09-05	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	482.7K	¥1,402	+12.1%	¥677M ($4.4M)
2025-09-05	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	2.0M	¥1,402	+12.1%	¥2.1B ($13.6M)
2025-09-05	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	5.7M	¥1,402	-12.1%	¥1.7B ($11.1M)
2025-08-28	BUY	Market Buy	株式会社エフティグループ FTGroup Co., Ltd.	passive	3.3M	¥1,379	+13.9%	¥802M ($5.2M)
2025-08-28	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	927.8K	¥1,379	+13.9%	¥513M ($3.3M)
2025-08-28	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	6.4M	¥1,379	+13.9%	¥8.9B ($57.3M)
2025-08-19	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	486.3K	¥1,414	-11.1%	¥40M ($261K)
2025-08-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	362.8K	¥1,414	-11.1%	¥67M ($435K)
2025-08-19	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	7.1M	¥1,414	-11.1%	¥54M ($348K)
2025-06-20	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	513.5K	¥1,298	-21.0%	¥25M ($160K)
2025-06-20	BUY	Market Buy	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	23.0K	¥1,298	+21.0%	¥2.5B ($16.0M)
2025-06-20	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	413.6K	¥1,298	+21.0%	¥161M ($1.0M)
2025-06-20	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	7.1M	¥1,298	+21.0%	¥247M ($1.6M)
2025-04-16	BUY	Market Buy	株式会社エフティグループ FTGroup Co., Ltd.	passive	2.7M	¥1,335	+17.7%	¥1.2B ($7.9M)
2025-04-16	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	552.3K	¥1,335	+17.7%	¥76M ($493K)
2025-04-16	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	6.4M	¥1,335	+17.7%	¥8.6B ($55.5M)
2025-03-24	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	531.8K	¥1,358	-15.7%	¥802M ($5.2M)

Showing the 50 most recent of 105 filings.

Frequently asked questions

Who has been buying Yamazen Corporation stock?: 13 distinct investors have filed 41 disclosed large-shareholding filings in Yamazen Corporation (8051), most recently on 2026-05-12. 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 Yamazen Corporation have?: Yamazen Corporation has 41 buy-side and 39 sell-side disclosures on record, covering ¥61.8B ($398.9M) in total reported value, spanning 2021-04-22 to 2026-05-12.
Where does StockDrifts get Yamazen Corporation 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 Yamazen Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.