Who has been buying kaihan co.,Ltd. stock?

15 distinct investors have filed 33 disclosed large-shareholding filings in kaihan co.,Ltd. (3133), most recently on 2026-05-13. 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 kaihan co.,Ltd. have?

kaihan co.,Ltd. has 33 buy-side and 50 sell-side disclosures on record, covering ¥28.9B ($186.3M) in total reported value, spanning 2021-04-01 to 2026-05-13.

Where does StockDrifts get kaihan 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.

kaihan co.,Ltd. 3133

Company

株式会社海帆kaihan co.,Ltd.

Investors

Buys

Total Value

¥28.9B ($186.3M)

Avg Return

-49.66%

Last Filing

2026-05-13

kaihan co.,Ltd. (3133) has 33 disclosed large-shareholding filings and 50 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥28.9B ($186.3M) in reported transaction value. The earliest filing StockDrifts holds for kaihan co.,Ltd. is dated 2021-04-01; the most recent is 2026-05-13. 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 -49.66%, 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
2026-05-26	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥180	-41.1%	-
2026-05-26	SELL	private	エボファンド Evo Fund	activist	52.2M	¥180	+41.1%	¥123M ($796K)
2026-05-22	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥217	-51.1%	-
2026-05-22	SELL	private	エボファンド Evo Fund	activist	53.5M	¥217	+51.1%	¥132M ($854K)
2026-05-13	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥216	-38.4%	-
2026-05-13	SELL	private	エボファンド Evo Fund	activist	54.6M	¥216	+38.4%	¥134M ($867K)
2026-04-01	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥360	-26.9%	-
2026-04-01	SELL	private	エボファンド Evo Fund	activist	55.8M	¥360	+26.9%	¥216M ($1.4M)
2026-03-16	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥368	-18.8%	-
2026-03-16	BUY	private	エボファンド Evo Fund	activist	57.0M	¥368	-18.8%	¥17.0B ($110.0M)
2025-05-22	SELL	Market Buy	山田亨 yamada toru	passive	8.3M	¥803	+62.8%	¥206M ($1.3M)
2025-05-14	SELL	unknown	山田亨 yamada toru	activist	8.3M	¥829	+63.9%	¥213M ($1.4M)
2025-05-13	BUY	unknown	株式会社コヒーレントシステムズ Coherent Systems co., ltd	other	0	¥869	-65.6%	-
2025-05-13	BUY	unknown	MEL CAPITAL LIMITED	other	2.8M	¥869	-65.6%	¥2.4B ($15.6M)
2024-08-09	BUY	Market Buy	山田亨 yamada toru	passive	8.3M	¥690	-56.7%	¥413M ($2.7M)
2024-06-05	BUY	Market Buy	山田亨 yamada toru	activist	7.7M	¥960	-68.8%	¥521M ($3.4M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	4.9M	¥927	-67.8%	¥1.0B ($6.7M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	4.7M	¥927	-67.8%	¥85M ($550K)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	2.3M	¥927	-67.8%	¥547M ($3.5M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	4.6M	¥927	-67.8%	¥31M ($203K)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	2.8M	¥927	-67.8%	¥610M ($3.9M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	5.0M	¥927	-67.8%	¥103M ($663K)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	4.6M	¥927	-67.8%	¥31M ($203K)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	4.0M	¥927	-67.8%	¥493M ($3.2M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	3.5M	¥927	-67.8%	¥493M ($3.2M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	2.8M	¥927	-67.8%	¥610M ($3.9M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	5.0M	¥927	-67.8%	¥103M ($663K)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	4.9M	¥927	-67.8%	¥1.0B ($6.7M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	4.7M	¥927	-67.8%	¥85M ($550K)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	4.0M	¥927	-67.8%	¥493M ($3.2M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	3.5M	¥927	-67.8%	¥493M ($3.2M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	2.3M	¥927	-67.8%	¥547M ($3.5M)
2024-05-02	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	4.0M	¥927	-67.8%	¥493M ($3.2M)
2024-05-01	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	5.0M	¥914	-67.3%	¥94M ($607K)
2024-05-01	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	5.0M	¥914	-67.3%	¥98M ($630K)
2024-05-01	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	5.0M	¥914	-67.3%	¥94M ($607K)
2024-05-01	BUY	Market Buy	株式会社YourTurn YOUR TURN	passive	5.0M	¥914	-67.3%	¥98M ($630K)
2024-04-30	BUY	Market Buy	山田亨 yamada toru	activist	7.1M	¥901	-66.8%	¥540M ($3.5M)
2024-04-30	BUY	unknown	山田亨 yamada toru	activist	7.1M	¥901	-66.8%	¥6.4B ($41.5M)
2024-04-17	BUY	Market Buy	山田亨 yamada toru	passive	7.1M	¥915	-67.3%	¥549M ($3.5M)
2024-04-09	BUY	Market Buy	山田亨 yamada toru	passive	6.5M	¥898	-66.7%	¥973M ($6.3M)
2024-04-09	BUY	Market Buy	山田亨 yamada toru	passive	6.5M	¥898	-66.7%	¥968M ($6.2M)
2024-04-08	SELL	unknown	合同会社アローエナジー arrow energy LLC.	other	700.0K	¥892	+66.5%	¥1.7B ($11.2M)
2023-12-19	BUY	Market Buy	山田亨 yamada toru	passive	5.2M	¥988	-69.7%	¥387M ($2.5M)
2023-12-19	BUY	Market Buy	山田亨 yamada toru	passive	5.2M	¥988	-69.7%	¥5.2B ($33.4M)
2023-12-19	SELL	Market Buy	日本エンジェルズ・インベストメント株式会社 Nippon Angels Investment Co.Ltd.	passive	0	¥988	+69.7%	¥2.9B ($18.6M)
2023-12-19	BUY	Market Buy	NAICサステナブル合同会社 NAIC Sustainable LLC	passive	2.9M	¥988	-69.7%	¥2.9B ($18.6M)
2023-12-19	BUY	Market Buy	日本エンジェルズ・インベストメント株式会社 Nippon Angels Investment Co.Ltd.	passive	0	¥988	-69.7%	¥2.9B ($18.6M)
2023-12-19	BUY	Market Buy	NAICサステナブル合同会社 NAIC Sustainable LLC	passive	2.9M	¥988	-69.7%	¥2.9B ($18.6M)
2023-12-19	BUY	Market Buy	日本エンジェルズ・インベストメント株式会社 Nippon Angels Investment Co.Ltd.	passive	0	¥988	-69.7%	¥2.9B ($18.6M)

Showing the 50 most recent of 186 filings.

Frequently asked questions

Who has been buying kaihan co.,Ltd. stock?: 15 distinct investors have filed 33 disclosed large-shareholding filings in kaihan co.,Ltd. (3133), most recently on 2026-05-13. 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 kaihan co.,Ltd. have?: kaihan co.,Ltd. has 33 buy-side and 50 sell-side disclosures on record, covering ¥28.9B ($186.3M) in total reported value, spanning 2021-04-01 to 2026-05-13.
Where does StockDrifts get kaihan 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 kaihan co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.