Who has been buying Uchida Yoko Co., Ltd. stock?

11 distinct investors have filed 18 disclosed large-shareholding filings in Uchida Yoko Co., Ltd. (8057), most recently on 2025-09-19. 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 Uchida Yoko Co., Ltd. have?

Uchida Yoko Co., Ltd. has 18 buy-side and 15 sell-side disclosures on record, covering ¥2.5B ($16.4M) in total reported value, spanning 2021-04-06 to 2025-09-19.

Where does StockDrifts get Uchida Yoko 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.

Uchida Yoko Co., Ltd. 8057

Company

株式会社内田洋行Uchida Yoko Co., Ltd.

Investors

Buys

Total Value

¥2.5B ($16.4M)

Avg Return

+83.50%

Last Filing

2025-09-19

Uchida Yoko Co., Ltd. (8057) has 18 disclosed large-shareholding filings and 15 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥2.5B ($16.4M) in reported transaction value. The earliest filing StockDrifts holds for Uchida Yoko Co., Ltd. is dated 2021-04-06; the most recent is 2025-09-19. 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 +83.50%, 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
2025-09-19	SELL	negotiated	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	114.8K	¥2,506	+19.0%	¥50M ($320K)
2025-09-19	SELL	negotiated	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	181.9K	¥2,506	+19.0%	¥52M ($337K)
2025-09-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	487.5K	¥2,506	-19.0%	¥1.2B ($7.9M)
2025-04-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	181.4K	¥1,526	-33.0%	¥25M ($164K)
2025-04-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	3.7K	¥1,526	+33.0%	¥494M ($3.2M)
2025-04-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	other	274.8K	¥1,526	+33.0%	¥419M ($2.7M)
2025-03-24	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	197.7K	¥1,556	+30.4%	¥308M ($2.0M)
2025-03-24	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	93.1K	¥1,556	+30.4%	¥145M ($934K)
2025-03-24	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	other	274.8K	¥1,556	+30.4%	¥428M ($2.8M)
2024-10-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	7.6K	¥1,292	-57.0%	¥109M ($703K)
2024-10-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	other	274.8K	¥1,292	+57.0%	¥355M ($2.3M)
2024-10-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	185.2K	¥1,292	-57.0%	¥1M ($9K)
2024-09-24	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	186.6K	¥1,360	+49.2%	¥254M ($1.6M)
2024-09-24	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	92.0K	¥1,360	+49.2%	¥125M ($807K)
2024-09-24	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	other	274.8K	¥1,360	+49.2%	¥374M ($2.4M)
2024-09-20	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	134.8K	¥1,346	+50.7%	¥41M ($262K)
2024-09-20	SELL	negotiated	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	203.5K	¥1,346	-50.7%	¥144M ($932K)
2024-09-20	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	487.5K	¥1,346	+50.7%	¥656M ($4.2M)
2023-09-07	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	281.7K	¥1,392	-45.8%	¥16M ($103K)
2023-09-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-480	¥1,392	-45.8%	¥126M ($814K)
2023-09-07	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	129.9K	¥1,392	-45.8%	¥39M ($253K)
2023-06-21	SELL	Market Buy	コロンビア・マネジメント・インベストメント・アドバイザーズ・エルエルシー(Columbia Management Investment Advisers, LLC) Columbia Management Investment Advisers, LLC	passive	375.7K	¥1,138	-78.3%	¥168M ($1.1M)
2023-05-10	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	292.7K	¥1,052	-92.9%	¥26M ($170K)
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	90.8K	¥1,052	-92.9%	¥101M ($651K)
2023-05-10	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	158.4K	¥1,052	+92.9%	¥112M ($721K)
2023-04-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	317.6K	¥994	+104.1%	¥316M ($2.0M)
2023-04-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	186.8K	¥994	+104.1%	¥186M ($1.2M)
2023-04-21	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	52.4K	¥994	+104.1%	¥52M ($336K)
2023-01-11	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-200	¥910	-123.0%	¥189M ($1.2M)
2023-01-11	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	304.2K	¥910	-123.0%	¥948K ($6K)
2023-01-11	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	59.0K	¥910	+123.0%	¥30M ($196K)
2022-12-26	BUY	unknown	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	787.8K	¥893	+127.2%	¥704M ($4.5M)
2022-12-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	305.2K	¥889	+128.2%	¥271M ($1.8M)
2022-12-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	25.9K	¥889	+128.2%	¥23M ($149K)
2022-12-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	206.9K	¥889	+128.2%	¥184M ($1.2M)
2021-08-05	SELL	Market Buy	コロンビア・マネジメント・インベストメント・アドバイザーズ・エルエルシー(Columbia Management Investment Advisers, LLC) Columbia Management Investment Advisers, LLC	passive	524.6K	¥1,014	-100.1%	¥3M ($20K)
2021-04-06	BUY	Market Buy	コロンビア・マネジメント・インベストメント・アドバイザーズ・エルエルシー(Columbia Management Investment Advisers, LLC) Columbia Management Investment Advisers, LLC	passive	527.1K	¥844.165	+140.4%	¥445M ($2.9M)

Frequently asked questions

Who has been buying Uchida Yoko Co., Ltd. stock?: 11 distinct investors have filed 18 disclosed large-shareholding filings in Uchida Yoko Co., Ltd. (8057), most recently on 2025-09-19. 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 Uchida Yoko Co., Ltd. have?: Uchida Yoko Co., Ltd. has 18 buy-side and 15 sell-side disclosures on record, covering ¥2.5B ($16.4M) in total reported value, spanning 2021-04-06 to 2025-09-19.
Where does StockDrifts get Uchida Yoko 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 Uchida Yoko Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.