Who has been buying Hoshi Iryo-Sanki Co., Ltd. stock?

4 distinct investors have filed 9 disclosed large-shareholding filings in Hoshi Iryo-Sanki Co., Ltd. (7634), most recently on 2025-09-29. 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 Hoshi Iryo-Sanki Co., Ltd. have?

Hoshi Iryo-Sanki Co., Ltd. has 9 buy-side and 3 sell-side disclosures on record, covering ¥2.0B ($12.9M) in total reported value, spanning 2021-08-20 to 2025-09-29.

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.

Hoshi Iryo-Sanki Co., Ltd. 7634

Company

株式会社星医療酸器Hoshi Iryo-Sanki Co., Ltd.

Investors

Buys

Total Value

¥2.0B ($12.9M)

Avg Return

+21.66%

Last Filing

2025-09-29

Hoshi Iryo-Sanki Co., Ltd. (7634) has 9 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥2.0B ($12.9M) in reported transaction value. The earliest filing StockDrifts holds for Hoshi Iryo-Sanki Co., Ltd. is dated 2021-08-20; the most recent is 2025-09-29. Across these filings the average return since disclosure is +21.66%, 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
2026-09-15	BUY	Market Buy	株式会社UH Partners 3	passive	67.0K	¥5,030	+4.4%	¥148M ($954K)
2026-09-15	BUY	Market Buy	株式会社UH Partners 2	passive	234.3K	¥5,030	-	-
2026-09-15	BUY	Market Buy	光通信株式会社	passive	247.4K	¥5,030	-	-
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	247.4K	¥5,000	-	-
2025-09-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	234.3K	¥5,000	-	-
2025-09-29	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	37.7K	¥5,000	+5.0%	¥15M ($99K)
2025-08-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	247.4K	¥4,700	-	-
2025-08-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	234.3K	¥4,700	-	-
2025-08-26	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	34.4K	¥4,700	-	¥162M ($1.0M)
2025-03-06	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	247.4K	¥4,350	+20.7%	¥302M ($1.9M)
2025-03-06	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	234.1K	¥4,350	-	-
2025-03-06	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	247.4K	¥4,350	+20.7%	¥302M ($1.9M)
2025-03-06	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	234.1K	¥4,350	-	-
2025-01-21	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	234.1K	¥4,345	-	-
2025-01-21	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	178.0K	¥4,345	+20.8%	¥150M ($968K)
2024-10-22	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	143.4K	¥4,225	+24.3%	¥111M ($718K)
2024-10-22	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	234.1K	¥4,225	+24.3%	¥36M ($233K)
2024-02-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	42.2K	¥4,650	-12.9%	¥1.1B ($7.4M)
2024-01-30	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	225.6K	¥4,650	+12.9%	¥1.0B ($6.8M)
2024-01-30	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	116.9K	¥4,650	+12.9%	¥544M ($3.5M)
2021-12-22	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	287.4K	¥3,890	+35.0%	¥144M ($927K)
2021-09-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	250.4K	¥4,230	-24.1%	¥318M ($2.1M)
2021-08-20	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	325.5K	¥5,580	+5.9%	¥193M ($1.2M)

Frequently asked questions

Who has been buying Hoshi Iryo-Sanki Co., Ltd. stock?: 4 distinct investors have filed 9 disclosed large-shareholding filings in Hoshi Iryo-Sanki Co., Ltd. (7634), most recently on 2025-09-29. 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 Hoshi Iryo-Sanki Co., Ltd. have?: Hoshi Iryo-Sanki Co., Ltd. has 9 buy-side and 3 sell-side disclosures on record, covering ¥2.0B ($12.9M) in total reported value, spanning 2021-08-20 to 2025-09-29.
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.