Who has been buying rakumo Inc. stock?

6 distinct investors have filed 26 disclosed large-shareholding filings in rakumo Inc. (4060), 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 rakumo Inc. have?

rakumo Inc. has 26 buy-side and 24 sell-side disclosures on record, covering ¥1.7B ($10.8M) in total reported value, spanning 2021-04-30 to 2026-04-07.

Where does StockDrifts get rakumo Inc. 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.

rakumo Inc. 4060

Company

rakumo株式会社rakumo Inc.

Investors

Buys

Total Value

¥1.7B ($10.8M)

Avg Return

+25.96%

Last Filing

2026-04-07

rakumo Inc. (4060) has 26 disclosed large-shareholding filings and 24 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥1.7B ($10.8M) in reported transaction value. The earliest filing StockDrifts holds for rakumo Inc. is dated 2021-04-30; 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 +25.96%, 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
2026-06-08	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	1.0M	¥1,075	+4.3%	¥4M ($24K)
2026-06-08	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	1.2M	¥1,075	+4.3%	¥13M ($85K)
2026-06-08	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	1.2M	¥1,075	+4.3%	¥1.3B ($8.1M)
2026-06-08	SELL	Market Buy	平井康博 YASUHIRO HIRAI	passive	1.2M	¥1,075	-4.3%	¥3M ($16K)
2026-04-07	SELL	unknown	御手洗大祐	strategic	963.6K	¥1,108	-2.0%	¥59M ($379K)
2026-04-07	SELL	unknown	株式会社創世	strategic	368.0K	¥1,108	-2.0%	¥3M ($21K)
2026-04-07	SELL	unknown	御手洗大祐	strategic	963.6K	¥1,108	-2.0%	¥59M ($379K)
2026-04-07	SELL	unknown	株式会社創世	strategic	368.0K	¥1,108	-2.0%	¥3M ($21K)
2025-06-23	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	1.2M	¥869	+34.2%	¥9M ($59K)
2025-06-23	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	1.2M	¥869	+34.2%	¥9M ($59K)
2025-05-07	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	1.1M	¥872	+33.7%	¥68M ($438K)
2025-04-01	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	1.1M	¥849	+37.3%	¥52M ($337K)
2025-01-22	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	1.0M	¥856	+36.2%	¥52M ($339K)
2025-01-22	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	942.9K	¥856	+36.2%	¥53M ($342K)
2025-01-08	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	879.3K	¥918	+27.0%	¥55M ($356K)
2025-01-08	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	768.6K	¥918	+27.0%	¥35M ($226K)
2025-01-08	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	818.9K	¥918	+27.0%	¥27M ($175K)
2024-12-27	SELL	unknown	株式会社創世	activist	368.0K	¥897	-30.0%	¥1M ($7K)
2024-12-27	SELL	unknown	御手洗大祐	activist	1.0M	¥897	-30.0%	¥3M ($20K)
2024-12-27	SELL	unknown	株式会社創世 Sosei Co., Ltd.	activist	368.0K	¥897	-30.0%	¥1M ($7K)
2024-12-27	SELL	unknown	御手洗大祐 Mitarai Daisuke	activist	1.0M	¥897	-30.0%	¥3M ($20K)
2024-12-12	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	789.4K	¥903	+29.1%	¥57M ($371K)
2024-12-12	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	789.4K	¥903	+29.1%	¥57M ($371K)
2024-11-28	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	434.8K	¥892	+30.7%	¥50M ($320K)
2024-11-28	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	434.8K	¥892	+30.7%	¥50M ($320K)
2024-11-26	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	642.0K	¥945	+23.4%	¥121M ($783K)
2024-11-26	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	642.0K	¥945	+23.4%	¥121M ($783K)
2024-11-26	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	730.6K	¥945	+23.4%	¥82M ($529K)
2024-11-26	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	730.6K	¥945	+23.4%	¥84M ($539K)
2024-11-01	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	451.7K	¥872	+33.7%	¥5M ($32K)
2024-11-01	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	513.6K	¥872	+33.7%	¥54M ($348K)
2024-11-01	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	451.7K	¥872	+33.7%	¥63M ($407K)
2024-11-01	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	497.2K	¥872	+33.7%	¥54M ($351K)
2024-11-01	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	434.8K	¥872	+33.7%	¥48M ($312K)
2024-11-01	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	513.6K	¥872	+33.7%	¥5M ($31K)
2024-10-07	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	312.0K	¥895	+30.3%	¥279M ($1.8M)
2024-10-07	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	503.8K	¥895	+30.3%	¥172M ($1.1M)
2024-10-07	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	379.6K	¥895	+30.3%	¥61M ($391K)
2024-10-07	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	379.6K	¥895	+30.3%	¥61M ($391K)
2024-10-07	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	379.6K	¥895	+30.3%	¥4M ($26K)
2024-10-07	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	312.0K	¥895	+30.3%	¥279M ($1.8M)
2024-10-07	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	379.6K	¥895	+30.3%	¥61M ($391K)
2024-09-20	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	312.0K	¥925	+26.1%	¥186M ($1.2M)
2024-09-20	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	312.0K	¥925	+26.1%	¥289M ($1.9M)
2024-09-20	BUY	Market Buy	平井康博 YASUHIRO HIRAI	passive	312.0K	¥925	+26.1%	¥289M ($1.9M)
2024-02-27	SELL	Market Buy	アイ・マーキュリーキャピタル株式会社 i-mercury Capital, Inc.	other	340.3K	¥1,327	+12.1%	¥85M ($549K)
2024-02-27	BUY	Market Buy	アイ・マーキュリーキャピタル株式会社 i-mercury Capital, Inc.	other	340.3K	¥1,327	-12.1%	¥85M ($549K)
2023-12-27	SELL	unknown	株式会社創世	activist	368.0K	¥1,086	-7.4%	¥17M ($109K)
2023-12-27	SELL	unknown	御手洗大祐	activist	1.0M	¥1,086	-7.4%	¥19M ($121K)
2023-12-27	SELL	unknown	株式会社創世 Sosei Co., Ltd.	activist	368.0K	¥1,086	-7.4%	¥17M ($109K)

Showing the 50 most recent of 74 filings.

Frequently asked questions

Who has been buying rakumo Inc. stock?: 6 distinct investors have filed 26 disclosed large-shareholding filings in rakumo Inc. (4060), 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 rakumo Inc. have?: rakumo Inc. has 26 buy-side and 24 sell-side disclosures on record, covering ¥1.7B ($10.8M) in total reported value, spanning 2021-04-30 to 2026-04-07.
Where does StockDrifts get rakumo Inc. 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 rakumo Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.