Who has been buying Tsubakimoto Chain Co. stock?

13 distinct investors have filed 6 disclosed large-shareholding filings in Tsubakimoto Chain Co. (6371), most recently on 2025-07-04. 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 Tsubakimoto Chain Co. have?

Tsubakimoto Chain Co. has 6 buy-side and 6 sell-side disclosures on record, covering ¥4.1B ($26.5M) in total reported value, spanning 2021-11-19 to 2025-07-04.

Where does StockDrifts get Tsubakimoto Chain Co. 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.

Tsubakimoto Chain Co. 6371

Company

株式会社椿本チエインTsubakimoto Chain Co.

Investors

Buys

Total Value

¥4.1B ($26.5M)

Avg Return

+97.08%

Last Filing

2025-07-04

Tsubakimoto Chain Co. (6371) has 6 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥4.1B ($26.5M) in reported transaction value. The earliest filing StockDrifts holds for Tsubakimoto Chain Co. is dated 2021-11-19; the most recent is 2025-07-04. 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 +97.08%, 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
2025-07-04	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.4M	¥1,818	+30.6%	¥753M ($4.9M)
2025-07-04	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	2.1M	¥1,818	+30.6%	¥251M ($1.6M)
2025-07-04	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	1.0M	¥1,818	-30.6%	¥2.4B ($15.7M)
2023-12-06	SELL	Market Buy	太陽生命保険株式会社 TAIYO LIFE INSURANCE COMPANY	passive	3.2M	¥1,266.67	-87.5%	¥587M ($3.8M)
2023-01-11	BUY	Market Buy	日本生命保険相互会社 Nippon Life Insurance Company	passive	1.7M	¥1,001.67	+137.1%	¥1.7B ($10.8M)
2023-01-11	SELL	Market Buy	ニッセイアセットマネジメント株式会社 Nissay Asset Management Company	other	127.6K	¥1,001.67	-137.1%	¥115M ($742K)
2022-03-22	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	641.5K	¥1,058.33	-124.4%	¥73M ($470K)
2022-03-22	SELL	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	22.3K	¥1,058.33	-124.4%	¥41M ($261K)
2022-03-22	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	156.6K	¥1,058.33	+124.4%	¥73M ($470K)
2022-03-22	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	810.3K	¥1,058.33	-124.4%	¥348M ($2.2M)
2021-11-19	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	60.9K	¥1,033.33	+129.8%	¥63M ($406K)
2021-11-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.6M	¥1,033.33	+129.8%	¥1.6B ($10.4M)
2021-11-19	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	9.2K	¥1,033.33	+129.8%	¥736M ($4.7M)

Frequently asked questions

Who has been buying Tsubakimoto Chain Co. stock?: 13 distinct investors have filed 6 disclosed large-shareholding filings in Tsubakimoto Chain Co. (6371), most recently on 2025-07-04. 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 Tsubakimoto Chain Co. have?: Tsubakimoto Chain Co. has 6 buy-side and 6 sell-side disclosures on record, covering ¥4.1B ($26.5M) in total reported value, spanning 2021-11-19 to 2025-07-04.
Where does StockDrifts get Tsubakimoto Chain Co. 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 Tsubakimoto Chain Co.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.