Who has been buying Asax Co., Ltd. stock?

10 distinct investors have filed 10 disclosed large-shareholding filings in Asax Co., Ltd. (8772), most recently on 2026-01-15. 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 Asax Co., Ltd. have?

Asax Co., Ltd. has 10 buy-side and 4 sell-side disclosures on record, covering ¥1.7B ($10.8M) in total reported value, spanning 2021-03-22 to 2026-01-15.

Where does StockDrifts get Asax 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.

Asax Co., Ltd. 8772

Company

株式会社アサックスAsax Co., Ltd.

Investors

Buys

Total Value

¥1.7B ($10.8M)

Avg Return

+34.08%

Last Filing

2026-01-15

Asax Co., Ltd. (8772) has 10 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥1.7B ($10.8M) in reported transaction value. The earliest filing StockDrifts holds for Asax Co., Ltd. is dated 2021-03-22; the most recent is 2026-01-15. 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 +34.08%, 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
2026-01-15	BUY	Market Buy	草間大樹	passive	32.1K	¥865	+2.1%	¥27M ($175K)
2026-01-15	BUY	Market Buy	草間雄介	passive	225.0K	¥865	+2.1%	¥191M ($1.2M)
2026-01-15	BUY	Market Buy	株式会社フレキシブル	passive	11.4M	¥865	+2.1%	¥9.7B ($62.3M)
2026-01-15	BUY	Market Buy	草間裕子	passive	225.0K	¥865	+2.1%	¥191M ($1.2M)
2024-10-15	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.9M	¥720	+17.6%	¥237M ($1.5M)
2024-10-15	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.5M	¥720	+17.6%	¥1.8B ($11.5M)
2024-04-05	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.6M	¥764	+10.9%	¥254M ($1.6M)
2024-04-05	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.5M	¥764	+10.9%	¥1.9B ($12.2M)
2023-09-22	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.2M	¥676	+25.3%	¥223M ($1.4M)
2023-09-22	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.5M	¥676	+25.3%	¥1.7B ($10.8M)
2022-12-27	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	914.2K	¥592	+43.1%	¥201M ($1.3M)
2022-12-27	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.5M	¥592	+43.1%	¥1.5B ($9.5M)
2022-10-31	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	572.6K	¥585	+44.8%	¥230M ($1.5M)
2022-10-31	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.5M	¥585	+44.8%	¥1.4B ($9.3M)
2022-10-03	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	181.7K	¥581	+45.8%	¥106M ($681K)
2022-10-03	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.5M	¥581	+45.8%	¥90M ($581K)
2022-08-22	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.3M	¥602	-40.7%	¥210M ($1.4M)
2022-08-05	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.3M	¥604	+40.2%	¥201M ($1.3M)
2022-05-20	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.0M	¥579	+46.3%	¥195M ($1.3M)
2022-05-16	BUY	Market Buy	草間大樹 Daiki Kusama	passive	32.1K	¥583	+45.3%	¥19M ($121K)
2022-05-16	BUY	Market Buy	草間雄介 Yusuke Kusama	passive	225.0K	¥583	+45.3%	¥131M ($846K)
2022-05-16	SELL	negotiated	草間庸文 Tsunefumi Kusama	activist	9.5M	¥583	-45.3%	¥233M ($1.5M)
2022-05-16	BUY	Market Buy	株式会社フレキシブル Flexible Co., Ltd.	passive	11.4M	¥583	+45.3%	¥233M ($1.5M)
2022-05-16	BUY	Market Buy	草間裕子 Yuko Kusama	passive	225.0K	¥583	+45.3%	¥131M ($846K)
2022-05-16	BUY	negotiated	株式会社山和 Yamawa Co., Ltd.	strategic	770.1K	¥583	+45.3%	¥449M ($2.9M)
2022-05-16	BUY	negotiated	草間康子 Yasuko Kusama	strategic	270.0K	¥583	+45.3%	¥157M ($1.0M)
2021-06-14	BUY	negotiated	株式会社山和 Yamawa Co., Ltd.	strategic	770.1K	¥716	+18.3%	¥551M ($3.6M)
2021-06-14	SELL	negotiated	草間庸文 Tsunefumi Kusama	activist	9.9M	¥716	-18.3%	¥241M ($1.6M)
2021-06-14	BUY	negotiated	草間康子 Yasuko Kusama	strategic	270.0K	¥716	+18.3%	¥193M ($1.2M)
2021-06-07	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.7M	¥697	+21.5%	¥1.2B ($7.4M)
2021-03-22	BUY	negotiated	株式会社山和 Yamawa Co., Ltd.	strategic	770.1K	¥675.246	+25.4%	¥520M ($3.4M)
2021-03-22	BUY	negotiated	草間康子 Yasuko Kusama	strategic	270.0K	¥675.246	+25.4%	¥182M ($1.2M)
2021-03-22	SELL	negotiated	草間庸文 Tsunefumi Kusama	activist	10.2M	¥675.246	-25.4%	¥225M ($1.5M)

Frequently asked questions

Who has been buying Asax Co., Ltd. stock?: 10 distinct investors have filed 10 disclosed large-shareholding filings in Asax Co., Ltd. (8772), most recently on 2026-01-15. 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 Asax Co., Ltd. have?: Asax Co., Ltd. has 10 buy-side and 4 sell-side disclosures on record, covering ¥1.7B ($10.8M) in total reported value, spanning 2021-03-22 to 2026-01-15.
Where does StockDrifts get Asax 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 Asax Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.