Who has been buying TOKYO KEIKI Inc. stock?

15 distinct investors have filed 47 disclosed large-shareholding filings in TOKYO KEIKI Inc. (7721), most recently on 2026-03-23. 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 TOKYO KEIKI Inc. have?

TOKYO KEIKI Inc. has 47 buy-side and 34 sell-side disclosures on record, covering ¥16.5B ($106.4M) in total reported value, spanning 2021-03-29 to 2026-03-23.

Where does StockDrifts get TOKYO KEIKI 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.

TOKYO KEIKI Inc. 7721

Company

東京計器株式会社TOKYO KEIKI Inc.

Investors

Buys

Total Value

¥16.5B ($106.4M)

Avg Return

+260.32%

Last Filing

2026-03-23

TOKYO KEIKI Inc. (7721) has 47 disclosed large-shareholding filings and 34 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥16.5B ($106.4M) in reported transaction value. The earliest filing StockDrifts holds for TOKYO KEIKI Inc. is dated 2021-03-29; the most recent is 2026-03-23. 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 +260.32%, 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
2026-05-22	SELL	unknown	SMBC日興証券株式会社	other	50.1K	¥6,250	-1.3%	¥53M ($344K)
2026-05-22	BUY	unknown	株式会社三井住友銀行	other	653.3K	¥6,250	+1.3%	¥4.1B ($26.3M)
2026-05-22	SELL	Market Buy	三井住友DSアセットマネジメント株式会社	passive	327.1K	¥6,250	-1.3%	¥1.5B ($9.7M)
2026-03-23	SELL	unknown	三井住友DSアセットマネジメント株式会社	passive	567.9K	¥7,290	-3.4%	¥4.3B ($27.6M)
2026-03-23	BUY	unknown	株式会社三井住友銀行	other	653.3K	¥7,290	-3.4%	¥4.9B ($31.8M)
2026-03-23	SELL	unknown	SMBC日興証券株式会社	other	58.2K	¥7,290	-3.4%	¥439M ($2.8M)
2026-02-05	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	620.7K	¥7,200	-4.7%	¥1.7B ($10.9M)
2025-12-19	SELL	unknown	アモーヴァ・アセットマネジメント株式会社	other	288.8K	¥5,280	-42.8%	¥2.2B ($14.0M)
2025-12-19	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社	other	428.4K	¥5,280	-42.8%	¥3.2B ($20.8M)
2025-12-19	BUY	unknown	野村アセットマネジメント株式会社	other	508.9K	¥5,280	+42.8%	¥3.8B ($24.8M)
2025-12-19	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥5,280	-42.8%	-
2025-12-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	115.7K	¥5,280	-42.8%	¥872M ($5.6M)
2025-12-19	BUY	unknown	野村證券株式会社	other	229.4K	¥5,280	+42.8%	¥1.7B ($11.2M)
2025-11-07	BUY	unknown	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	293.5K	¥5,710	+32.0%	¥1.7B ($10.8M)
2025-11-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	507.5K	¥5,710	+32.0%	¥439M ($2.8M)
2025-11-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	292.7K	¥5,710	+32.0%	¥614M ($4.0M)
2025-11-07	BUY	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	609.6K	¥5,710	+32.0%	¥3.5B ($22.5M)
2025-11-07	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥5,710	+32.0%	-
2025-11-07	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	78.6K	¥5,710	-32.0%	¥1.7B ($10.7M)
2025-10-22	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	430.0K	¥5,160	-46.1%	¥9M ($57K)
2025-10-22	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	183.9K	¥5,160	+46.1%	¥916M ($5.9M)
2025-10-22	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	368.2K	¥5,160	-46.1%	¥502M ($3.2M)
2025-10-22	BUY	Market Buy	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥5,160	+46.1%	-
2025-10-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	432.4K	¥5,010	+50.5%	¥9M ($55K)
2025-10-06	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥5,010	+50.5%	-
2025-10-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	7.7K	¥5,010	+50.5%	¥958M ($6.2M)
2025-10-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	466.6K	¥5,010	+50.5%	¥2.3B ($15.1M)
2025-09-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	431.0K	¥4,705	+60.3%	¥8M ($52K)
2025-09-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	491.1K	¥4,705	-60.3%	¥8M ($52K)
2025-09-05	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	429.3K	¥4,175	-80.6%	¥7M ($46K)
2025-09-05	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	492.9K	¥4,175	-80.6%	¥421M ($2.7M)
2025-09-05	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	15.9K	¥4,175	-80.6%	¥1.4B ($9.2M)
2025-08-19	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	18.7K	¥4,870	+54.8%	¥91M ($588K)
2025-08-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	429.9K	¥4,870	+54.8%	¥2.1B ($13.5M)
2025-08-19	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	594.4K	¥4,870	+54.8%	¥2.9B ($18.7M)
2025-08-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	430.0K	¥4,800	+57.1%	¥2.1B ($13.3M)
2025-08-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	346.7K	¥4,800	-57.1%	¥500M ($3.2M)
2025-07-17	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	429.6K	¥4,115	-83.2%	¥21M ($136K)
2025-07-17	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	451.5K	¥4,115	-83.2%	¥731M ($4.7M)
2025-07-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	435.9K	¥4,050	+86.2%	¥1.8B ($11.4M)
2025-07-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	627.7K	¥4,050	+86.2%	¥2.5B ($16.4M)
2025-02-03	SELL	unknown	東京計器協力会理事長酒井憲一 Kenichi Sakai	other	753.6K	¥3,005	-150.9%	¥775M ($5.0M)
2025-01-08	BUY	unknown	東京計器協力会理事長酒井憲一 Kenichi Sakai	other	1.2M	¥3,105	+142.8%	¥16M ($103K)
2025-01-07	BUY	unknown	東京計器協力会理事長酒井憲一 Kenichi Sakai	other	1.0M	¥3,160	+138.6%	¥653M ($4.2M)
2025-01-07	SELL	unknown	酒井憲一 Kenichi Sakai	other	1.0M	¥3,160	-138.6%	¥669M ($4.3M)
2024-09-20	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	238.7K	¥3,090	+144.0%	¥53M ($340K)
2024-09-20	BUY	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	426.2K	¥3,090	+144.0%	¥1.3B ($8.4M)
2024-08-22	SELL	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	219.9K	¥2,876	-162.2%	¥5M ($32K)
2024-08-22	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	653.3K	¥2,876	+162.2%	¥1.9B ($12.1M)
2024-08-22	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	592.1K	¥2,876	+162.2%	¥717M ($4.6M)

Showing the 50 most recent of 114 filings.

Frequently asked questions

Who has been buying TOKYO KEIKI Inc. stock?: 15 distinct investors have filed 47 disclosed large-shareholding filings in TOKYO KEIKI Inc. (7721), most recently on 2026-03-23. 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 TOKYO KEIKI Inc. have?: TOKYO KEIKI Inc. has 47 buy-side and 34 sell-side disclosures on record, covering ¥16.5B ($106.4M) in total reported value, spanning 2021-03-29 to 2026-03-23.
Where does StockDrifts get TOKYO KEIKI 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 TOKYO KEIKI Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.