Who has been buying Computer Institute of Japan, Ltd. stock?

3 distinct investors have filed 8 disclosed large-shareholding filings in Computer Institute of Japan, Ltd. (4826), most recently on 2026-02-06. 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 Computer Institute of Japan, Ltd. have?

Computer Institute of Japan, Ltd. has 8 buy-side and 14 sell-side disclosures on record, covering ¥175M ($1.1M) in total reported value, spanning 2021-04-15 to 2026-02-06.

Where does StockDrifts get Computer Institute of Japan, 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.

Computer Institute of Japan, Ltd. 4826

Company

株式会社ＣＩＪComputer Institute of Japan, Ltd.

Investors

Buys

Total Value

¥175M ($1.1M)

Avg Return

+98.68%

Last Filing

2026-02-06

Computer Institute of Japan, Ltd. (4826) has 8 disclosed large-shareholding filings and 14 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥175M ($1.1M) in reported transaction value. The earliest filing StockDrifts holds for Computer Institute of Japan, Ltd. is dated 2021-04-15; the most recent is 2026-02-06. 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 +98.68%, 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
2026-02-06	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	3.0M	¥493	-6.3%	¥335M ($2.2M)
2026-01-21	SELL	Market Buy	光通信株式会社	passive	3.7M	¥531	+1.3%	¥1.9B ($12.5M)
2026-01-21	SELL	Market Buy	株式会社UH Partners 2	unknown	0	¥531	+1.3%	-
2026-01-09	SELL	Market Buy	株式会社UH Partners 2	passive	31.4K	¥564	+7.1%	¥16M ($106K)
2026-01-09	BUY	Market Buy	光通信株式会社	passive	4.4M	¥564	+7.1%	¥2.3B ($14.7M)
2025-12-18	BUY	Market Buy	株式会社エスアイエル	unknown	0	¥520	-0.8%	-
2025-12-18	SELL	Market Buy	株式会社UH Partners 2	passive	704.3K	¥520	-0.8%	¥369M ($2.4M)
2025-12-18	BUY	Market Buy	光通信株式会社	passive	4.4M	¥520	-0.8%	¥2.3B ($14.7M)
2025-12-15	SELL	Market Buy	株式会社エスアイエル	passive	60	¥538	+2.6%	¥31K ($203)
2025-12-15	SELL	Market Buy	株式会社UH Partners 2	passive	1.4M	¥538	+2.6%	¥732M ($4.7M)
2025-12-15	BUY	Market Buy	光通信株式会社	passive	4.4M	¥538	+2.6%	¥2.3B ($14.7M)
2025-11-19	SELL	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	736.4K	¥493	-6.3%	¥303M ($2.0M)
2025-11-19	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.5M	¥493	+6.3%	¥737M ($4.8M)
2025-11-19	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	4.4M	¥493	-6.3%	¥19M ($124K)
2025-09-26	SELL	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.5M	¥493	-6.3%	¥259M ($1.7M)
2025-09-26	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	1.4M	¥493	+6.3%	¥22M ($144K)
2025-09-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	4.4M	¥493	+6.3%	¥58M ($371K)
2024-04-16	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	1.4M	¥486	+7.8%	¥657M ($4.2M)
2024-04-16	SELL	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	2.1M	¥486	-7.8%	¥328M ($2.1M)
2024-04-16	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	4.4M	¥486	+7.8%	¥2.1B ($13.8M)
2024-04-02	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	901.4K	¥562	-6.8%	¥507M ($3.3M)
2024-04-02	SELL	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.8M	¥562	+6.8%	¥280M ($1.8M)
2024-04-02	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.9M	¥562	-6.8%	¥1.7B ($10.7M)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	375.6K	¥228.61	+129.2%	¥86M ($554K)
2022-01-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	974.9K	¥228.61	+129.2%	¥25M ($161K)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	375.6K	¥228.61	+129.2%	¥86M ($554K)
2022-01-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	974.9K	¥228.61	+129.2%	¥25M ($161K)
2022-01-18	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥228.61	-129.2%	¥86M ($556K)
2022-01-18	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.2M	¥228.61	-129.2%	¥86M ($556K)
2021-11-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	865.0K	¥219.17	+139.1%	¥4M ($29K)
2021-11-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.6M	¥219.17	+139.1%	¥351M ($2.3M)
2021-11-04	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	843.4K	¥238.33	+119.9%	¥45M ($288K)
2021-11-04	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.6M	¥238.33	+119.9%	¥382M ($2.5M)
2021-07-06	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	656.7K	¥228.06	+129.8%	¥26M ($167K)
2021-07-06	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.6M	¥228.06	+129.8%	¥19M ($120K)
2021-04-15	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	572.6K	¥254.72	+105.7%	¥146M ($941K)
2021-04-15	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.6M	¥254.72	+105.7%	¥408M ($2.6M)

Frequently asked questions

Who has been buying Computer Institute of Japan, Ltd. stock?: 3 distinct investors have filed 8 disclosed large-shareholding filings in Computer Institute of Japan, Ltd. (4826), most recently on 2026-02-06. 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 Computer Institute of Japan, Ltd. have?: Computer Institute of Japan, Ltd. has 8 buy-side and 14 sell-side disclosures on record, covering ¥175M ($1.1M) in total reported value, spanning 2021-04-15 to 2026-02-06.
Where does StockDrifts get Computer Institute of Japan, 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 Computer Institute of Japan, Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.