Who has been buying Image Information Inc. stock?

9 distinct investors have filed 10 disclosed large-shareholding filings in Image Information Inc. (3803), most recently on 2026-03-30. 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 Image Information Inc. have?

Image Information Inc. has 10 buy-side and 34 sell-side disclosures on record, covering ¥889M ($5.7M) in total reported value, spanning 2021-06-09 to 2026-03-30.

Where does StockDrifts get Image Information 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.

Image Information Inc. 3803

Company

イメージ情報開発株式会社Image Information Inc.

Investors

Buys

Total Value

¥889M ($5.7M)

Avg Return

+6.78%

Last Filing

2026-03-30

Image Information Inc. (3803) has 10 disclosed large-shareholding filings and 34 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥889M ($5.7M) in reported transaction value. The earliest filing StockDrifts holds for Image Information Inc. is dated 2021-06-09; the most recent is 2026-03-30. 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 +6.78%, 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
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	0	¥579	-5.5%	¥470M ($3.0M)
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	690.9K	¥579	-5.5%	¥36M ($232K)
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	728.3K	¥579	-5.5%	¥22M ($140K)
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	765.9K	¥579	-5.5%	¥22M ($140K)
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	812.0K	¥579	-5.5%	¥27M ($172K)
2026-03-30	SELL	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	0	¥579	+5.5%	¥470M ($3.0M)
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	0	¥579	-5.5%	¥470M ($3.0M)
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	728.3K	¥579	-5.5%	¥22M ($140K)
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	690.9K	¥579	-5.5%	¥36M ($232K)
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	728.3K	¥579	-5.5%	¥22M ($140K)
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	765.9K	¥579	-5.5%	¥22M ($140K)
2026-03-30	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	812.0K	¥579	-5.5%	¥27M ($172K)
2026-03-18	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	628.6K	¥725	-15.9%	¥50M ($323K)
2026-03-18	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	628.6K	¥725	-15.9%	¥50M ($323K)
2026-03-18	SELL	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	629.4K	¥725	+15.9%	¥49M ($315K)
2026-03-16	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	697.7K	¥648	-5.9%	¥23M ($151K)
2026-03-16	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	697.7K	¥648	-5.9%	¥23M ($151K)
2026-03-16	SELL	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	696.5K	¥648	+5.9%	¥24M ($156K)
2026-03-13	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	733.7K	¥548	+11.3%	¥313M ($2.0M)
2026-03-13	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	733.7K	¥548	+11.3%	¥313M ($2.0M)
2026-03-12	SELL	unknown	株式会社イメージ企画 Image Kikaku Corporation	other	612.0K	¥511	-19.4%	¥281M ($1.8M)
2026-03-05	SELL	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	162.8K	¥535	-14.0%	¥20M ($128K)
2026-03-05	BUY	Market Buy	株式会社JBFアドバイザリー JBF advisory Co., Ltd.	passive	200.0K	¥535	+14.0%	¥107M ($690K)
2026-03-04	SELL	negotiated	代永拓史	activist	53.2K	¥522	-16.9%	¥32M ($209K)
2026-03-04	SELL	negotiated	株式会社NBI	activist	200.0K	¥522	-16.9%	¥122M ($787K)
2026-02-24	BUY	unknown	サイブリッジ合同会社 CYBRiDGE LLC.	activist	1.3M	¥648	-5.9%	¥843M ($5.4M)
2025-10-30	SELL	Market Buy	代永英子 Eiko Yonaga	passive	33.8K	¥736	+17.1%	¥11M ($72K)
2025-10-30	SELL	Market Buy	代永衛 Mamoru Tainaga	passive	110.4K	¥736	+17.1%	¥4M ($29K)
2025-10-20	SELL	Market Buy	代永英子 Eiko Yonaga	passive	49.0K	¥783	+22.1%	¥12M ($78K)
2025-10-20	SELL	Market Buy	代永英子 Eiko Yonaga	passive	49.0K	¥783	+22.1%	¥12M ($78K)
2025-10-20	SELL	Market Buy	代永衛 Mamoru Tainaga	passive	116.5K	¥783	+22.1%	¥5M ($33K)
2025-10-20	SELL	Market Buy	代永衛 Mamoru Tainaga	passive	116.5K	¥783	+22.1%	¥5M ($33K)
2025-09-17	SELL	Market Buy	代永英子 Eiko Yonaga	passive	64.4K	¥1,055	+42.2%	¥15M ($95K)
2025-09-17	SELL	Market Buy	代永衛 Mamoru Tainaga	passive	122.9K	¥1,055	+42.2%	¥16M ($101K)
2025-09-10	SELL	Market Buy	代永英子 Eiko Yonaga	passive	78.4K	¥1,646	+62.9%	¥25M ($159K)
2025-09-10	SELL	Market Buy	代永衛 Mamoru Tainaga	passive	137.6K	¥1,646	+62.9%	¥10M ($62K)
2025-09-02	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	100.0K	¥1,011	-39.7%	¥56M ($360K)
2025-09-02	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	155.1K	¥1,011	-39.7%	¥24M ($156K)
2025-09-02	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	100.0K	¥1,011	-39.7%	¥6M ($36K)
2025-09-02	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	155.1K	¥1,011	-39.7%	¥2M ($16K)
2025-09-02	SELL	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	100.0K	¥1,011	+39.7%	¥3M ($17K)
2025-09-02	SELL	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	155.1K	¥1,011	+39.7%	¥2M ($12K)
2025-09-02	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	100.0K	¥1,011	-39.7%	¥56M ($360K)
2025-09-02	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	155.1K	¥1,011	-39.7%	¥24M ($156K)
2025-08-29	BUY	Market Buy	株式会社ミヤマ代表取締役須藤信由 MIYAMA K.K.	passive	179.1K	¥875	-30.3%	¥157M ($1.0M)
2025-08-28	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	179.1K	¥875	-30.3%	¥18M ($119K)
2025-08-28	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	179.1K	¥875	-30.3%	¥18M ($119K)
2025-08-28	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	179.1K	¥875	-30.3%	¥2M ($12K)
2025-08-28	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	179.1K	¥875	-30.3%	¥2M ($10K)
2025-08-28	BUY	Market Buy	株式会社ミヤマ MIYAMA K.K.	passive	179.1K	¥875	-30.3%	¥18M ($119K)

Showing the 50 most recent of 73 filings.

Frequently asked questions

Who has been buying Image Information Inc. stock?: 9 distinct investors have filed 10 disclosed large-shareholding filings in Image Information Inc. (3803), most recently on 2026-03-30. 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 Image Information Inc. have?: Image Information Inc. has 10 buy-side and 34 sell-side disclosures on record, covering ¥889M ($5.7M) in total reported value, spanning 2021-06-09 to 2026-03-30.
Where does StockDrifts get Image Information 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 Image Information Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.