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

5 distinct investors have filed 14 disclosed large-shareholding filings in Kyosha Co., Ltd. (6837), most recently on 2025-08-29. 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 Kyosha Co., Ltd. have?

Kyosha Co., Ltd. has 14 buy-side and 2 sell-side disclosures on record, covering ¥857M ($5.5M) in total reported value, spanning 2024-10-01 to 2025-08-29.

Where does StockDrifts get Kyosha 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.

Kyosha Co., Ltd. 6837

Company

株式会社京写Kyosha Co., Ltd.

Investors

Buys

Total Value

¥857M ($5.5M)

Avg Return

-13.98%

Last Filing

2025-08-29

Kyosha Co., Ltd. (6837) has 14 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥857M ($5.5M) in reported transaction value. The earliest filing StockDrifts holds for Kyosha Co., Ltd. is dated 2024-10-01; the most recent is 2025-08-29. 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 -13.98%, 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
2025-08-29	SELL	unknown	児嶋雄二 Yuji Kojima	activist	955.8K	¥364	+19.5%	¥72M ($467K)
2024-10-07	SELL	unknown	株式会社児嶋コーポレーション Kojima Corporation Co., Ltd.	activist	2.0M	¥343	+14.6%	¥7M ($45K)
2024-10-07	BUY	unknown	株式会社児嶋コーポレーション Kojima Corporation Co., Ltd.	activist	2.0M	¥343	-14.6%	¥702M ($4.5M)
2024-10-07	BUY	Market Buy	児嶋雄二 KOJIMA YUJI	activist	1.2M	¥343	-14.6%	¥2M ($13K)
2024-10-07	BUY	unknown	児嶋雄二 KOJIMA YUJI	activist	1.2M	¥343	-14.6%	¥2M ($13K)
2024-10-07	BUY	unknown	児嶋雄二 KOJIMA YUJI	activist	1.2M	¥343	-14.6%	¥2M ($13K)
2024-10-01	BUY	unknown	児嶋一登 Kazuto Kojima	activist	426.0K	¥340	-13.8%	¥145M ($934K)
2024-10-01	BUY	unknown	児嶋一登 Kazuto Kojima	activist	426.0K	¥340	-13.8%	¥145M ($934K)
2024-10-01	BUY	unknown	株式会社児嶋コーポレーション Kojima Corporation Co., Ltd.	strategic	2.0M	¥340	-13.8%	¥696M ($4.5M)
2024-10-01	BUY	unknown	株式会社児嶋 Kojima Co., Ltd.	activist	180.0K	¥340	-13.8%	¥61M ($395K)
2024-10-01	BUY	unknown	児嶋京子 Kyoko Kojima	strategic	30.0K	¥340	-13.8%	¥10M ($66K)
2024-10-01	BUY	unknown	株式会社児嶋コーポレーション Kojima Corporation Co., Ltd.	unknown	2.0M	¥340	-13.8%	¥696M ($4.5M)
2024-10-01	BUY	unknown	株式会社児嶋 Kojima Co., Ltd.	unknown	180.0K	¥340	-13.8%	¥61M ($395K)
2024-10-01	BUY	unknown	株式会社児嶋コーポレーション Kojima Corporation Co., Ltd.	strategic	2.0M	¥340	-13.8%	¥696M ($4.5M)
2024-10-01	BUY	unknown	株式会社児嶋 Kojima Co., Ltd.	activist	180.0K	¥340	-13.8%	¥61M ($395K)
2024-10-01	BUY	unknown	児嶋京子 Kyoko Kojima	strategic	30.0K	¥340	-13.8%	¥10M ($66K)
2024-10-01	BUY	unknown	児嶋一登 Kazuto Kojima	activist	426.0K	¥340	-13.8%	¥145M ($934K)

Frequently asked questions

Who has been buying Kyosha Co., Ltd. stock?: 5 distinct investors have filed 14 disclosed large-shareholding filings in Kyosha Co., Ltd. (6837), most recently on 2025-08-29. 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 Kyosha Co., Ltd. have?: Kyosha Co., Ltd. has 14 buy-side and 2 sell-side disclosures on record, covering ¥857M ($5.5M) in total reported value, spanning 2024-10-01 to 2025-08-29.
Where does StockDrifts get Kyosha 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 Kyosha Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.