Who has been buying Tamura Corporation stock?

15 distinct investors have filed 31 disclosed large-shareholding filings in Tamura Corporation (6768), most recently on 2025-03-07. 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 Tamura Corporation have?

Tamura Corporation has 31 buy-side and 32 sell-side disclosures on record, covering ¥6.9B ($44.5M) in total reported value, spanning 2021-04-22 to 2025-03-07.

Where does StockDrifts get Tamura 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.

Tamura Corporation 6768

Company

株式会社タムラ製作所Tamura Corporation

Investors

Buys

Total Value

¥6.9B ($44.5M)

Avg Return

+0.50%

Last Filing

2025-03-07

Tamura Corporation (6768) has 31 disclosed large-shareholding filings and 32 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥6.9B ($44.5M) in reported transaction value. The earliest filing StockDrifts holds for Tamura Corporation is dated 2021-04-22; the most recent is 2025-03-07. 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 +0.50%, 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
2026-06-05	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	9.6K	¥1,083	+13.3%	¥117M ($752K)
2026-06-05	SELL	unknown	アセットマネジメントOne株式会社	other	4.1M	¥1,083	+13.3%	¥762M ($4.9M)
2026-06-05	SELL	negotiated	みずほ証券株式会社	strategic	155.9K	¥1,083	+13.3%	¥18M ($116K)
2026-06-05	BUY	unknown	株式会社みずほ銀行	strategic	2.0M	¥1,083	-13.3%	¥2.2B ($14.0M)
2026-06-05	BUY	unknown	野村アセットマネジメント株式会社	other	3.8M	¥1,083	-13.3%	¥4.1B ($26.6M)
2026-06-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	353.6K	¥1,083	-13.3%	¥383M ($2.5M)
2025-03-07	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	113.3K	¥532	+39.1%	¥60M ($389K)
2025-03-07	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	4.8M	¥532	+39.1%	¥388M ($2.5M)
2025-03-07	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	172.7K	¥532	+39.1%	¥13M ($85K)
2025-03-07	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.0M	¥532	+39.1%	¥1.1B ($6.9M)
2024-11-08	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	69.5K	¥543	-36.3%	¥9M ($58K)
2024-11-08	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	4.0M	¥543	-36.3%	¥463M ($3.0M)
2024-11-08	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	146.2K	¥543	+36.3%	¥4M ($29K)
2024-11-08	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.0M	¥543	+36.3%	¥1.1B ($7.0M)
2024-09-06	BUY	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	83.0K	¥607	+21.9%	¥50M ($325K)
2024-09-06	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	4.9M	¥607	+21.9%	¥507M ($3.3M)
2024-09-06	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	142.9K	¥607	-21.9%	¥30M ($194K)
2024-09-06	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.0M	¥607	+21.9%	¥1.2B ($7.8M)
2024-06-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	193.2K	¥693	+6.8%	¥134M ($864K)
2024-06-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.0M	¥693	+6.8%	¥1.4B ($8.9M)
2024-06-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	4.0M	¥693	+6.8%	¥895M ($5.8M)
2024-05-09	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.0M	¥660	+12.1%	¥1.3B ($8.5M)
2024-05-09	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.8M	¥660	+12.1%	¥579M ($3.7M)
2024-05-09	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	strategic	187.8K	¥660	-12.1%	¥180M ($1.2M)
2023-08-04	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	474.5K	¥588	-25.9%	¥555M ($3.6M)
2023-08-04	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.2M	¥588	-25.9%	¥5M ($31K)
2023-08-04	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	2.3M	¥588	-25.9%	¥127M ($816K)
2023-05-09	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.2M	¥800	+7.5%	¥26M ($171K)
2023-05-09	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	2.5M	¥800	+7.5%	¥40M ($256K)
2023-05-09	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	1.4M	¥800	-7.5%	¥1.1B ($7.3M)
2023-03-22	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	2.6M	¥789	+6.2%	¥13M ($84K)
2023-03-22	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.2M	¥789	-6.2%	¥33M ($211K)
2023-03-22	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	1.4M	¥789	-6.2%	¥1.1B ($7.2M)
2023-02-06	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.2M	¥781	-5.3%	¥71M ($459K)
2023-02-06	BUY	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	2.6M	¥781	-5.3%	¥116M ($751K)
2023-02-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	1.4M	¥781	-5.3%	¥1.1B ($7.1M)
2022-10-20	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	2.5M	¥714	-3.6%	¥6M ($38K)
2022-10-20	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	1.4M	¥714	+3.6%	¥1.0B ($6.5M)
2022-10-20	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.1M	¥714	+3.6%	¥793M ($5.1M)
2022-09-22	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.1M	¥665	+11.3%	¥737M ($4.8M)
2022-09-22	BUY	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	2.5M	¥665	+11.3%	¥1.6B ($10.5M)
2022-09-22	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	1.4M	¥665	+11.3%	¥939M ($6.1M)
2022-09-06	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.1M	¥735	-0.7%	¥116M ($746K)
2022-09-06	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	2.5M	¥735	-0.7%	¥49M ($314K)
2022-09-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	1.4M	¥735	+0.7%	¥1.0B ($6.7M)
2022-04-21	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.3M	¥576	+28.5%	¥728M ($4.7M)
2022-04-21	BUY	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	2.5M	¥576	+28.5%	¥119M ($769K)
2022-04-21	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	1.4M	¥576	+28.5%	¥813M ($5.2M)
2022-01-11	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	¥656	+12.8%	-
2022-01-11	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.2M	¥656	-12.8%	¥190M ($1.2M)

Showing the 50 most recent of 105 filings.

Frequently asked questions

Who has been buying Tamura Corporation stock?: 15 distinct investors have filed 31 disclosed large-shareholding filings in Tamura Corporation (6768), most recently on 2025-03-07. 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 Tamura Corporation have?: Tamura Corporation has 31 buy-side and 32 sell-side disclosures on record, covering ¥6.9B ($44.5M) in total reported value, spanning 2021-04-22 to 2025-03-07.
Where does StockDrifts get Tamura 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 Tamura Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.