Who has been buying Tanaka Seimitsu Kogyo Co., Ltd. stock?

5 distinct investors have filed 4 disclosed large-shareholding filings in Tanaka Seimitsu Kogyo Co., Ltd. (7218), most recently on 2025-06-20. 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 Tanaka Seimitsu Kogyo Co., Ltd. have?

Tanaka Seimitsu Kogyo Co., Ltd. has 4 buy-side and 3 sell-side disclosures on record, covering ¥3.2B ($20.4M) in total reported value, spanning 2022-04-15 to 2025-06-20.

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.

Tanaka Seimitsu Kogyo Co., Ltd. 7218

Company

田中精密工業株式会社Tanaka Seimitsu Kogyo Co., Ltd.

Investors

Buys

Total Value

¥3.2B ($20.4M)

Avg Return

+45.72%

Last Filing

2025-06-20

Tanaka Seimitsu Kogyo Co., Ltd. (7218) has 4 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥3.2B ($20.4M) in reported transaction value. The earliest filing StockDrifts holds for Tanaka Seimitsu Kogyo Co., Ltd. is dated 2022-04-15; the most recent is 2025-06-20. Across these filings the average return since disclosure is +45.72%, 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
2026-07-10	SELL	unknown	本田技研工業株式会社 HONDA MOTOR CO., LTD.	other	1.3M	¥1,019	-9.9%	¥1.1B ($7.0M)
2026-06-18	BUY	unknown	本田技研工業株式会社 HONDA MOTOR CO., LTD.	other	2.4M	¥964	-	-
2026-05-21	BUY	unknown	本田技研工業株式会社 HONDA MOTOR CO., LTD.	other	2.4M	¥1,011	-	-
2025-06-20	BUY	unknown	本田技研工業株式会社 HONDA MOTOR CO., LTD.	other	2.4M	¥1,019	+9.9%	¥2.4B ($15.6M)
2025-06-20	BUY	unknown	本田技研工業株式会社 HONDA MOTOR CO., LTD.	other	1.2M	¥1,019	-	¥1.2B ($7.8M)
2023-12-07	BUY	Market Buy	田中共進会持株会理事長澤田大樹 Sawada Taiju	other	1.2M	¥845	+32.5%	¥87M ($559K)
2023-02-15	BUY	unknown	田中一郎 Ichiro Tanaka	strategic	564.6K	¥674	-	¥68M ($442K)
2023-02-15	SELL	unknown	田中一郎 Ichiro Tanaka	strategic	564.6K	¥674	-66.2%	¥68M ($442K)
2022-05-24	BUY	unknown	共進会持株会理事長澤田大樹 sawada taiju	other	1.1M	¥603	+85.7%	¥654M ($4.2M)
2022-05-23	BUY	unknown	田中共進会持株会理事長澤田大樹 DAIJU SAWADA	other	1.1M	¥608	-	¥660M ($4.3M)
2022-05-23	BUY	unknown	田中共進会持株会理事長澤田大樹 DAIJU SAWADA	other	1.1M	¥608	+84.2%	¥660M ($4.3M)
2022-05-23	SELL	unknown	田中共進会持株会理事長平野平幸 HIRAYUKI HIRANO	other	0	¥608	-84.2%	¥613M ($4.0M)
2022-04-15	SELL	unknown	田中龍郎 TANAKA TATSURO	strategic	519.0K	¥605	-85.1%	¥60M ($389K)

Frequently asked questions

Who has been buying Tanaka Seimitsu Kogyo Co., Ltd. stock?: 5 distinct investors have filed 4 disclosed large-shareholding filings in Tanaka Seimitsu Kogyo Co., Ltd. (7218), most recently on 2025-06-20. 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 Tanaka Seimitsu Kogyo Co., Ltd. have?: Tanaka Seimitsu Kogyo Co., Ltd. has 4 buy-side and 3 sell-side disclosures on record, covering ¥3.2B ($20.4M) in total reported value, spanning 2022-04-15 to 2025-06-20.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.