Who has been buying Tsubakimoto Kogyo Co., Ltd. stock?

10 distinct investors have filed 27 disclosed large-shareholding filings in Tsubakimoto Kogyo Co., Ltd. (8052), most recently on 2026-04-07. 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 Tsubakimoto Kogyo Co., Ltd. have?

Tsubakimoto Kogyo Co., Ltd. has 27 buy-side and 25 sell-side disclosures on record, covering ¥6.7B ($43.3M) in total reported value, spanning 2021-03-29 to 2026-04-07.

Where does StockDrifts get Tsubakimoto Kogyo 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.

Tsubakimoto Kogyo Co., Ltd. 8052

Company

椿本興業株式会社Tsubakimoto Kogyo Co., Ltd.

Investors

Buys

Total Value

¥6.7B ($43.3M)

Avg Return

+43.12%

Last Filing

2026-04-07

Tsubakimoto Kogyo Co., Ltd. (8052) has 27 disclosed large-shareholding filings and 25 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥6.7B ($43.3M) in reported transaction value. The earliest filing StockDrifts holds for Tsubakimoto Kogyo Co., Ltd. is dated 2021-03-29; the most recent is 2026-04-07. 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 +43.12%, 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
2026-04-07	SELL	unknown	SMBC日興証券株式会社	other	236.3K	¥2,801	+0.4%	¥961M ($6.2M)
2026-04-07	BUY	unknown	株式会社三井住友銀行	other	431.1K	¥2,801	-0.4%	¥1.2B ($7.8M)
2026-04-06	BUY	negotiated	アモーヴァ・アセットマネジメント株式会社	other	213.0K	¥2,734	+2.0%	¥123M ($791K)
2026-04-06	BUY	negotiated	三井住友トラスト・アセットマネジメント株式会社	other	282.7K	¥2,734	+2.0%	¥16M ($103K)
2026-04-06	SELL	negotiated	三井住友信託銀行株式会社	strategic	283.6K	¥2,734	-2.0%	¥773M ($5.0M)
2026-03-23	BUY	unknown	株式会社三井住友銀行	other	431.1K	¥2,758	+0.6%	¥1.2B ($7.7M)
2026-03-23	BUY	unknown	SMBC日興証券株式会社	other	579.1K	¥2,758	+0.6%	¥1.6B ($10.4M)
2026-01-19	SELL	negotiated	三菱UFJモルガン・スタンレー証券株式会社	other	6.2K	¥2,976	+6.8%	¥17M ($110K)
2026-01-19	BUY	negotiated	三菱UFJアセットマネジメント株式会社	passive	103.0K	¥2,976	-6.8%	¥286M ($1.8M)
2026-01-19	BUY	negotiated	三菱UFJ信託銀行株式会社	passive	196.0K	¥2,976	-6.8%	¥544M ($3.5M)
2026-01-19	SELL	negotiated	株式会社三菱UFJ銀行	strategic	499.1K	¥2,976	+6.8%	¥1.4B ($8.9M)
2025-09-04	SELL	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	166.8K	¥2,941	+5.7%	¥40M ($259K)
2025-09-04	BUY	Market Buy	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	276.6K	¥2,941	-5.7%	¥126M ($814K)
2025-09-04	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	564.6K	¥2,941	-5.7%	¥1.7B ($10.7M)
2025-06-05	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	180.9K	¥2,264	+22.5%	¥410M ($2.6M)
2025-06-05	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	233.0K	¥2,264	+22.5%	¥528M ($3.4M)
2025-06-05	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	564.6K	¥2,264	+22.5%	¥1.3B ($8.2M)
2025-05-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	172.7K	¥2,215	-25.2%	¥617M ($4.0M)
2025-05-22	SELL	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	522.9K	¥2,215	-25.2%	¥112M ($724K)
2025-05-08	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	174.3K	¥2,221	-24.9%	¥43M ($279K)
2025-05-08	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	235.3K	¥2,221	-24.9%	¥43M ($279K)
2025-05-08	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	564.6K	¥2,221	-24.9%	¥208M ($1.3M)
2025-03-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	572.1K	¥2,218	+25.1%	¥1.3B ($8.2M)
2025-03-07	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	453.1K	¥2,218	+25.1%	¥1.0B ($6.5M)
2024-10-22	SELL	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	572.1K	¥1,850	-50.0%	¥50M ($326K)
2024-10-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	307.0K	¥1,850	-50.0%	¥559M ($3.6M)
2024-09-20	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	193.3K	¥1,772	+56.5%	¥142M ($914K)
2024-09-20	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	255.1K	¥1,772	-56.5%	¥48M ($312K)
2024-09-20	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	658.2K	¥1,772	-56.5%	¥332M ($2.1M)
2024-09-06	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	599.9K	¥1,753	+58.2%	¥1.1B ($6.8M)
2024-09-06	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	609.1K	¥1,753	+58.2%	¥1.1B ($6.9M)
2024-07-29	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	26.1K	¥1,998	-38.8%	¥4M ($25K)
2024-07-29	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	89.0K	¥1,998	+38.8%	¥178M ($1.1M)
2024-07-29	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	179.0K	¥1,998	+38.8%	¥4M ($25K)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	702.0K	¥1,998	+38.8%	¥1.4B ($9.0M)
2024-07-16	BUY	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	27.8K	¥2,135	+29.9%	¥59M ($382K)
2024-07-16	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	88.8K	¥2,135	+29.9%	¥190M ($1.2M)
2024-07-16	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	178.2K	¥2,135	+29.9%	¥380M ($2.5M)
2024-07-16	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	702.0K	¥2,135	+29.9%	¥1.5B ($9.7M)
2023-10-16	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	47.0K	¥1,570	+76.7%	¥74M ($476K)
2023-10-16	BUY	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	1.4K	¥1,570	+76.7%	¥90M ($579K)
2023-10-16	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	23.3K	¥1,570	+76.7%	¥4M ($26K)
2023-10-16	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	249.4K	¥1,570	-76.7%	¥48M ($309K)
2023-10-02	BUY	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	72.8K	¥1,610	+72.3%	¥117M ($756K)
2023-10-02	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	20.5K	¥1,610	+72.3%	¥33M ($213K)
2023-10-02	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	46.7K	¥1,610	-72.3%	¥16M ($101K)
2023-10-02	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	280.0K	¥1,610	+72.3%	¥451M ($2.9M)
2022-10-17	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	20.7K	¥1,260	+120.2%	¥10M ($63K)
2022-10-17	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	56.8K	¥1,260	-120.2%	¥2M ($16K)
2022-10-17	BUY	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	1.2K	¥1,260	+120.2%	¥20M ($127K)

Showing the 50 most recent of 69 filings.

Frequently asked questions

Who has been buying Tsubakimoto Kogyo Co., Ltd. stock?: 10 distinct investors have filed 27 disclosed large-shareholding filings in Tsubakimoto Kogyo Co., Ltd. (8052), most recently on 2026-04-07. 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 Tsubakimoto Kogyo Co., Ltd. have?: Tsubakimoto Kogyo Co., Ltd. has 27 buy-side and 25 sell-side disclosures on record, covering ¥6.7B ($43.3M) in total reported value, spanning 2021-03-29 to 2026-04-07.
Where does StockDrifts get Tsubakimoto Kogyo 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 Tsubakimoto Kogyo Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.