Who has been buying Nihon Yamamura Glass Co., Ltd. stock?

10 distinct investors have filed 13 disclosed large-shareholding filings in Nihon Yamamura Glass Co., Ltd. (5210), most recently on 2026-05-01. 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 Nihon Yamamura Glass Co., Ltd. have?

Nihon Yamamura Glass Co., Ltd. has 13 buy-side and 15 sell-side disclosures on record, covering ¥2.5B ($16.0M) in total reported value, spanning 2022-06-06 to 2026-05-01.

Where does StockDrifts get Nihon Yamamura Glass 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.

Nihon Yamamura Glass Co., Ltd. 5210

Company

日本山村硝子株式会社Nihon Yamamura Glass Co., Ltd.

Investors

Buys

Total Value

¥2.5B ($16.0M)

Avg Return

+74.54%

Last Filing

2026-05-01

Nihon Yamamura Glass Co., Ltd. (5210) has 13 disclosed large-shareholding filings and 15 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥2.5B ($16.0M) in reported transaction value. The earliest filing StockDrifts holds for Nihon Yamamura Glass Co., Ltd. is dated 2022-06-06; the most recent is 2026-05-01. 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 +74.54%, 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
2026-05-01	SELL	unknown	村上貴輝	activist	420.4K	¥3,095	+18.2%	¥269M ($1.7M)
2026-05-01	SELL	unknown	株式会社MI2	activist	300	¥3,095	+18.2%	¥252M ($1.6M)
2026-03-10	BUY	unknown	株式会社MI2	activist	80.9K	¥3,125	+12.0%	¥222M ($1.4M)
2026-03-10	SELL	unknown	村上貴輝	activist	506.8K	¥3,125	+12.0%	¥1.4B ($9.0M)
2026-03-04	SELL	unknown	村上貴輝	activist	696.1K	¥3,035	+9.4%	¥1.9B ($12.3M)
2026-03-04	BUY	unknown	株式会社MI2	activist	80.9K	¥3,035	+9.4%	¥222M ($1.4M)
2026-03-03	SELL	unknown	村上貴輝	activist	816.6K	¥3,215	+14.5%	¥2.2B ($14.5M)
2026-03-03	SELL	unknown	株式会社MI2	activist	80.9K	¥3,215	+14.5%	¥222M ($1.4M)
2025-09-08	BUY	unknown	村上貴輝 Takateru Murakami	activist	990.5K	¥2,859	-3.9%	¥2.8B ($18.3M)
2025-09-08	SELL	unknown	株式会社MI2 MI2 Ltd.	activist	83.4K	¥2,859	+3.9%	¥456M ($2.9M)
2025-09-01	BUY	unknown	村上貴輝 Takateru Murakami	activist	990.5K	¥2,922	-5.9%	¥2.9B ($18.7M)
2025-09-01	SELL	unknown	株式会社MI2 MI2 Ltd.	activist	242.6K	¥2,922	+5.9%	¥378M ($2.4M)
2025-03-17	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	229.1K	¥2,233	+23.1%	¥512M ($3.3M)
2025-03-17	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	103.7K	¥2,233	+23.1%	¥232M ($1.5M)
2025-03-17	BUY	negotiated	三菱UFJ eスマート証券株式会社 Mitsubishi UFJ eSmart Securities Co., Ltd.	other	19.6K	¥2,233	+23.1%	¥44M ($282K)
2025-03-17	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	strategic	227.7K	¥2,233	+23.1%	¥508M ($3.3M)
2024-08-19	BUY	Market Buy	村上貴輝 Takateru Murakami	activist	990.5K	¥1,486	+85.0%	¥1.5B ($9.5M)
2024-08-19	BUY	Market Buy	株式会社MI2 MI2 Ltd.	activist	371.8K	¥1,486	+85.0%	¥171M ($1.1M)
2024-08-15	BUY	Market Buy	村上貴輝 Takateru Murakami	activist	990.5K	¥1,468	+87.3%	¥1.5B ($9.4M)
2024-08-15	BUY	Market Buy	株式会社MI2 MI2 Ltd.	activist	257.8K	¥1,468	+87.3%	¥164M ($1.1M)
2024-08-13	BUY	Market Buy	村上貴輝 Takateru Murakami	activist	990.5K	¥1,421	+93.5%	¥136M ($879K)
2024-08-13	BUY	Market Buy	株式会社MI2 MI2 Ltd.	activist	145.8K	¥1,421	+93.5%	¥165M ($1.1M)
2024-05-23	BUY	unknown	村上貴輝 Takateru Murakami	activist	895.0K	¥1,768	+55.5%	¥313M ($2.0M)
2024-05-23	BUY	unknown	株式会社MI2 MI2 Ltd.	activist	30.0K	¥1,768	+55.5%	¥53M ($342K)
2024-05-21	BUY	unknown	村上貴輝 Takateru Murakami	activist	718.0K	¥1,879	+46.3%	¥285M ($1.8M)
2024-05-21	BUY	unknown	株式会社MI2 MI2 Ltd.	activist	30.0K	¥1,879	+46.3%	¥56M ($364K)
2024-05-17	BUY	unknown	村上貴輝 Takateru Murakami	activist	566.0K	¥1,577	+74.3%	¥893M ($5.8M)
2024-05-17	BUY	unknown	株式会社MI2 MI2 Ltd.	activist	30.0K	¥1,577	+74.3%	¥47M ($305K)
2024-03-04	BUY	negotiated	auカブコム証券株式会社 Mitsubishi UFJ Financial Group Inc.	other	20.5K	¥1,473	+86.6%	¥30M ($195K)
2024-03-04	SELL	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	20.4K	¥1,473	-86.6%	¥36M ($233K)
2024-03-04	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	286.6K	¥1,473	-86.6%	¥123M ($794K)
2024-03-04	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	229.1K	¥1,473	-86.6%	¥5M ($32K)
2023-07-21	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	97.3K	¥1,103	-149.2%	¥22M ($143K)
2023-07-21	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	317.3K	¥1,103	-149.2%	¥109M ($706K)
2023-07-21	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	26.2K	¥1,103	+149.2%	¥29M ($186K)
2022-06-06	BUY	negotiated	auカブコム証券株式会社 Mitsubishi UFJ Financial Group Inc.	other	20.6K	¥749	+267.0%	¥15M ($100K)
2022-06-06	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	44.4K	¥749	+267.0%	¥14M ($92K)
2022-06-06	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	370.5K	¥749	-267.0%	¥75M ($485K)
2022-06-06	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	232.7K	¥749	-267.0%	¥48M ($307K)

Frequently asked questions

Who has been buying Nihon Yamamura Glass Co., Ltd. stock?: 10 distinct investors have filed 13 disclosed large-shareholding filings in Nihon Yamamura Glass Co., Ltd. (5210), most recently on 2026-05-01. 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 Nihon Yamamura Glass Co., Ltd. have?: Nihon Yamamura Glass Co., Ltd. has 13 buy-side and 15 sell-side disclosures on record, covering ¥2.5B ($16.0M) in total reported value, spanning 2022-06-06 to 2026-05-01.
Where does StockDrifts get Nihon Yamamura Glass 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 Nihon Yamamura Glass Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.