Who has been buying Iwatani Corporation stock?

9 distinct investors have filed 9 disclosed large-shareholding filings in Iwatani Corporation (8088), most recently on 2026-03-16. 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 Iwatani Corporation have?

Iwatani Corporation has 9 buy-side and 6 sell-side disclosures on record, covering ¥11.3B ($72.8M) in total reported value, spanning 2021-06-21 to 2026-03-16.

Where does StockDrifts get Iwatani 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.

Iwatani Corporation 8088

Company

岩谷産業株式会社Iwatani Corporation

Investors

Buys

Total Value

¥11.3B ($72.8M)

Avg Return

+10.60%

Last Filing

2026-03-16

Iwatani Corporation (8088) has 9 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥11.3B ($72.8M) in reported transaction value. The earliest filing StockDrifts holds for Iwatani Corporation is dated 2021-06-21; the most recent is 2026-03-16. 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 +10.60%, 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
2026-07-06	BUY	unknown	アモーヴァ・アセットマネジメント株式会社	other	6.6M	¥2,047	-1.3%	¥13.5B ($86.8M)
2026-07-06	BUY	unknown	三井住友トラスト・アセットマネジメント株式会社	other	5.5M	¥2,047	-1.3%	¥11.2B ($72.5M)
2026-03-16	BUY	negotiated	MUFGセキュリティーズ(カナダ) MUFG Securities(Canada	other	275.8K	¥1,919.5	+3.9%	¥550M ($3.5M)
2026-03-16	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社	other	710.9K	¥1,919.5	+3.9%	¥1.4B ($9.1M)
2026-03-16	BUY	negotiated	三菱UFJアセットマネジメント株式会社	passive	1.8M	¥1,919.5	+3.9%	¥3.5B ($22.7M)
2026-03-16	BUY	negotiated	三菱UFJ信託銀行株式会社	passive	3.8M	¥1,919.5	+3.9%	¥7.5B ($48.3M)
2026-03-16	BUY	negotiated	株式会社三菱UFJ銀行	strategic	5.3M	¥1,919.5	+3.9%	¥10.7B ($68.7M)
2025-09-19	SELL	unknown	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	5.0M	¥1,645	-21.2%	¥1.8B ($11.4M)
2025-09-19	SELL	unknown	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	5.6M	¥1,645	-21.2%	¥539M ($3.5M)
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	372.8K	¥2,384.75	-16.4%	¥98M ($631K)
2024-07-29	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	867.0K	¥2,384.75	+16.4%	¥1.3B ($8.3M)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.3M	¥2,384.75	-16.4%	¥3.2B ($20.6M)
2024-03-25	SELL	Market Buy	ノルウェー銀行(Norges Bank) Norges Bank	passive	2.7M	¥1,959.25	-1.8%	¥447M ($2.9M)
2023-05-01	BUY	acquisition	ノルウェー銀行(Norges Bank) Norges Bank	passive	2.9M	¥1,605	+24.2%	¥4.7B ($30.4M)
2022-10-06	BUY	unknown	公益財団法人岩谷直治記念財団 The Iwatani Naoji Foundation	other	4.1M	¥1,415	+40.9%	¥5.8B ($37.7M)
2022-10-06	BUY	unknown	公益財団法人岩谷直治記念財団 The Iwatani Naoji Foundation	other	4.1M	¥1,415	+40.9%	¥847M ($5.5M)
2021-06-21	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	335.2K	¥1,567.5	+27.2%	¥73M ($474K)
2021-06-21	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.4M	¥1,567.5	-27.2%	¥652M ($4.2M)
2021-06-21	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.3M	¥1,567.5	-27.2%	¥349M ($2.3M)

Frequently asked questions

Who has been buying Iwatani Corporation stock?: 9 distinct investors have filed 9 disclosed large-shareholding filings in Iwatani Corporation (8088), most recently on 2026-03-16. 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 Iwatani Corporation have?: Iwatani Corporation has 9 buy-side and 6 sell-side disclosures on record, covering ¥11.3B ($72.8M) in total reported value, spanning 2021-06-21 to 2026-03-16.
Where does StockDrifts get Iwatani 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 Iwatani Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.