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

12 distinct investors have filed 26 disclosed large-shareholding filings in Tosho Co., Ltd. (8920), most recently on 2025-06-19. 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 Tosho Co., Ltd. have?

Tosho Co., Ltd. has 26 buy-side and 20 sell-side disclosures on record, covering ¥12.0B ($77.6M) in total reported value, spanning 2021-11-05 to 2025-06-19.

Where does StockDrifts get Tosho 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.

Tosho Co., Ltd. 8920

Company

株式会社東祥Tosho Co., Ltd.

Investors

Buys

Total Value

¥12.0B ($77.6M)

Avg Return

-25.52%

Last Filing

2025-06-19

Tosho Co., Ltd. (8920) has 26 disclosed large-shareholding filings and 20 disclosed disposals on record, filed by 12 distinct investors. Together those filings cover ¥12.0B ($77.6M) in reported transaction value. The earliest filing StockDrifts holds for Tosho Co., Ltd. is dated 2021-11-05; the most recent is 2025-06-19. 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 -25.52%, 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
2025-06-19	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.2M	¥598	-48.8%	¥85M ($547K)
2025-06-19	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	486.1K	¥598	-48.8%	¥451M ($2.9M)
2025-04-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.3M	¥529	-68.2%	¥336M ($2.2M)
2025-04-21	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	1.2M	¥529	-68.2%	¥73M ($471K)
2025-04-16	BUY	negotiated	沓名真裕美 Mayumi Kutsuna	other	667.2K	¥523	+70.2%	¥349M ($2.3M)
2025-04-16	BUY	negotiated	沓名俊裕 Toshihiro Kutsuna	activist	15.8M	¥523	+70.2%	¥8.3B ($53.3M)
2025-04-10	BUY	unknown	ラセット合同会社 Russet LLC	activist	1.1M	¥547	+62.7%	¥626M ($4.0M)
2025-04-10	BUY	unknown	沓名裕一郎 Yuichiro Kutsuna	activist	4.2M	¥547	+62.7%	¥2.3B ($14.8M)
2025-04-01	BUY	Market Buy	沓名眞裕美 Mayumi Kutsuna	other	667.2K	¥604	+47.4%	¥403M ($2.6M)
2025-04-01	SELL	Market Buy	沓名俊裕 Toshihiro Kutsuna	activist	15.8M	¥604	-47.4%	¥153M ($985K)
2025-04-01	BUY	Market Buy	ラセット合同会社 Russet LLC	activist	1.1M	¥604	+47.4%	¥155M ($1.0M)
2025-04-01	SELL	Market Buy	沓名裕一郎 Yuichiro Kutsuna	activist	4.2M	¥604	-47.4%	¥19M ($119K)
2025-03-26	BUY	unknown	沓名俊裕 Toshihiro Kutsuna	unknown	15.8M	¥647	+37.6%	¥10.2B ($65.9M)
2025-03-26	BUY	unknown	沓名俊裕 Toshihiro Kutsuna	unknown	15.8M	¥647	+37.6%	¥10.2B ($65.9M)
2025-03-26	SELL	unknown	沓名裕一郎 Yuichiro Kutsuna	activist	4.2M	¥647	-37.6%	¥10M ($64K)
2025-03-26	SELL	unknown	沓名裕一郎 Yuichiro Kutsuna	activist	4.2M	¥647	-37.6%	¥10M ($64K)
2025-03-25	BUY	negotiated	ラセット合同会社 Russet LLC	unknown	1.1M	¥649	+37.1%	¥743M ($4.8M)
2025-03-25	SELL	negotiated	沓名裕一郎 Yuichiro Kutsuna	unknown	4.2M	¥649	-37.1%	¥10M ($64K)
2025-03-25	BUY	negotiated	ラセット合同会社 Russet LLC	unknown	1.1M	¥649	+37.1%	¥743M ($4.8M)
2025-03-25	SELL	negotiated	沓名俊裕 Toshihiro Kutsuna	activist	15.8M	¥649	-37.1%	¥164M ($1.1M)
2025-03-25	SELL	negotiated	沓名俊裕 Toshihiro Kutsuna	activist	15.8M	¥649	-37.1%	¥164M ($1.1M)
2025-03-25	SELL	negotiated	沓名裕一郎 Yuichiro Kutsuna	unknown	4.2M	¥649	-37.1%	¥10M ($64K)
2025-03-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.0M	¥644	-38.2%	¥178M ($1.1M)
2025-03-21	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	1.4M	¥644	-38.2%	¥84M ($541K)
2024-10-03	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.2M	¥691	-28.8%	¥148M ($957K)
2024-10-03	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	1.5M	¥691	-28.8%	¥127M ($820K)
2023-11-24	BUY	Market Buy	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	1.7M	¥830	+7.2%	¥191M ($1.2M)
2023-11-24	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.4M	¥830	+7.2%	¥149M ($964K)
2023-06-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.4M	¥1,143	-22.1%	¥1.6B ($10.4M)
2023-06-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	15.9K	¥1,143	-22.1%	¥1.3B ($8.5M)
2023-06-07	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	311.3K	¥1,143	+22.1%	¥35M ($226K)
2023-06-06	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.3M	¥1,166	-23.7%	¥206M ($1.3M)
2023-06-06	BUY	Market Buy	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	1.5M	¥1,166	-23.7%	¥313M ($2.0M)
2023-05-10	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.1M	¥1,365	-34.8%	¥246M ($1.6M)
2023-05-10	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	3.3K	¥1,365	+34.8%	¥52M ($337K)
2023-05-10	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	340.8K	¥1,365	+34.8%	¥2.7B ($17.2M)
2023-05-09	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.1M	¥1,361	-34.6%	¥610M ($3.9M)
2023-05-09	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	1.2M	¥1,361	+34.6%	¥130M ($841K)
2023-03-07	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	24.6K	¥1,222	-27.2%	¥1.9B ($12.1M)
2023-03-07	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.0M	¥1,222	-27.2%	¥126M ($816K)
2023-03-07	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	419.8K	¥1,222	-27.2%	¥370M ($2.4M)
2022-10-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	1.8M	¥1,145	-22.3%	¥2.1B ($13.6M)
2022-10-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	117.2K	¥1,145	-22.3%	¥134M ($865K)
2022-10-21	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	8.0K	¥1,145	-22.3%	¥9M ($59K)
2022-10-05	BUY	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・エルエルシー J.P. Morgan Securities LLC	other	48.8K	¥1,239	-28.2%	¥9M ($61K)
2022-10-05	BUY	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	125.1K	¥1,239	-28.2%	¥33M ($214K)
2022-10-05	BUY	Market Buy	JPモルガン・アセット・マネジメント株式会社 JPMorgan Asset Management (Japan) Limited	passive	1.3M	¥1,239	-28.2%	¥1.6B ($10.4M)
2022-09-22	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.6M	¥1,248	-28.7%	¥555M ($3.6M)
2022-09-22	BUY	Market Buy	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	1.3M	¥1,248	-28.7%	¥43M ($278K)
2022-08-03	BUY	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・エルエルシー J.P. Morgan Securities LLC	other	42.7K	¥1,245	-28.5%	¥53M ($343K)

Showing the 50 most recent of 56 filings.

Frequently asked questions

Who has been buying Tosho Co., Ltd. stock?: 12 distinct investors have filed 26 disclosed large-shareholding filings in Tosho Co., Ltd. (8920), most recently on 2025-06-19. 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 Tosho Co., Ltd. have?: Tosho Co., Ltd. has 26 buy-side and 20 sell-side disclosures on record, covering ¥12.0B ($77.6M) in total reported value, spanning 2021-11-05 to 2025-06-19.
Where does StockDrifts get Tosho 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 Tosho Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.