Who has been buying Mitsuchi Corporation stock?

4 distinct investors have filed 4 disclosed large-shareholding filings in Mitsuchi Corporation (3439), most recently on 2026-03-18. 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 Mitsuchi Corporation have?

Mitsuchi Corporation has 4 buy-side and 8 sell-side disclosures on record, covering ¥576M ($3.7M) in total reported value, spanning 2021-06-10 to 2026-03-18.

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.

Mitsuchi Corporation 3439

Company

株式会社三ツ知Mitsuchi Corporation

Investors

Buys

Total Value

¥576M ($3.7M)

Avg Return

-29.79%

Last Filing

2026-03-18

Mitsuchi Corporation (3439) has 4 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥576M ($3.7M) in reported transaction value. The earliest filing StockDrifts holds for Mitsuchi Corporation is dated 2021-06-10; the most recent is 2026-03-18. Across these filings the average return since disclosure is -29.79%, 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
2026-03-18	SELL	unknown	野田正英 NODA MASAE	strategic	155.2K	¥639	-6.0%	¥77M ($494K)
2025-05-15	BUY	unknown	アイシンシロキ株式会社 AISIN SHIROKI CORPORATION	unknown	0	¥613	-	¥245M ($1.6M)
2025-05-15	SELL	unknown	アイシンシロキ株式会社 AISIN SHIROKI CORPORATION	unknown	0	¥613	-10.4%	¥245M ($1.6M)
2025-03-10	SELL	unknown	野田正英 NODA MASAE	strategic	275.2K	¥636	-6.5%	¥57M ($366K)
2025-03-10	BUY	unknown	野田正英 NODA MASAE	strategic	275.2K	¥636	-	¥57M ($366K)
2024-06-21	SELL	unknown	箕浦幹彦 (相続人代表箕浦智康) MIKIHIKO MINOURA	other	0	¥800	+15.4%	¥598M ($3.9M)
2024-02-28	SELL	unknown	株式会社三ツ知 NODA MASAE	strategic	364.3K	¥820	+17.4%	¥56M ($362K)
2024-02-28	BUY	unknown	野田正英 NODA MASAE	strategic	364.3K	¥820	-	¥56M ($359K)
2023-12-13	SELL	unknown	野田正英 NODA MASAE	strategic	432.5K	¥725	+6.6%	¥46M ($295K)
2022-09-20	SELL	unknown	松井証券株式会社 Matsui Securities Co.,Ltd	other	0	¥1,045	+35.2%	¥528M ($3.4M)
2022-08-03	BUY	unknown	松井証券株式会社 Matsui Securities Co.,Ltd	other	505.5K	¥1,027	-34.1%	¥519M ($3.3M)
2022-06-02	SELL	unknown	松井証券株式会社 Matsui Securities Co.,Ltd	other	0	¥1,148	+41.0%	¥565M ($3.6M)
2022-05-09	BUY	unknown	松井証券株式会社 Matsui Securities Co.,Ltd	other	492.2K	¥1,155	-41.4%	¥568M ($3.7M)
2022-03-18	BUY	Market Buy	箕浦幹彦 MIKIHIKO MINOURA	passive	747.7K	¥1,069	-	¥57M ($366K)
2022-03-18	BUY	Market Buy	箕浦幹彦 MIKIHIKO MINOURA	passive	747.7K	¥1,069	-36.7%	¥57M ($366K)
2021-06-10	BUY	Market Buy	箕浦幹彦 MIKIHIKO MINOURA	passive	347.3K	¥1,211	-44.1%	¥32M ($209K)

Frequently asked questions

Who has been buying Mitsuchi Corporation stock?: 4 distinct investors have filed 4 disclosed large-shareholding filings in Mitsuchi Corporation (3439), most recently on 2026-03-18. 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 Mitsuchi Corporation have?: Mitsuchi Corporation has 4 buy-side and 8 sell-side disclosures on record, covering ¥576M ($3.7M) in total reported value, spanning 2021-06-10 to 2026-03-18.
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.