Who has been buying Tokyo Kikai Seisakusho, Ltd. stock?

15 distinct investors have filed 37 disclosed large-shareholding filings in Tokyo Kikai Seisakusho, Ltd. (6335), most recently on 2025-08-26. 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 Kikai Seisakusho, Ltd. have?

Tokyo Kikai Seisakusho, Ltd. has 37 buy-side and 9 sell-side disclosures on record, covering ¥4.3B ($27.9M) in total reported value, spanning 2021-07-20 to 2025-08-26.

Where does StockDrifts get Tokyo Kikai Seisakusho, 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.

Tokyo Kikai Seisakusho, Ltd. 6335

Company

株式会社東京機械製作所Tokyo Kikai Seisakusho, Ltd.

Investors

Buys

Total Value

¥4.3B ($27.9M)

Avg Return

-32.90%

Last Filing

2025-08-26

Tokyo Kikai Seisakusho, Ltd. (6335) has 37 disclosed large-shareholding filings and 9 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥4.3B ($27.9M) in reported transaction value. The earliest filing StockDrifts holds for Tokyo Kikai Seisakusho, Ltd. is dated 2021-07-20; the most recent is 2025-08-26. 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 -32.90%, 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
2025-08-26	BUY	Market Buy	大田昭彦 Akihiko Ohta	passive	898.2K	¥399	+22.1%	¥36M ($229K)
2025-04-10	BUY	Market Buy	大田昭彦 Akihiko Ohta	passive	809.2K	¥370	+31.6%	¥33M ($210K)
2025-03-03	BUY	Market Buy	大田昭彦 Akihiko Ohta	passive	721.4K	¥403	+20.8%	¥36M ($231K)
2025-02-26	BUY	Market Buy	大田昭彦 Akihiko Ohta	passive	632.0K	¥407	+19.7%	¥37M ($241K)
2025-02-26	BUY	Market Buy	大田昭彦 Akihiko Ohta	passive	632.0K	¥407	+19.7%	¥37M ($241K)
2025-02-18	BUY	Market Buy	大田昭彦 Akihiko Ohta	passive	540.0K	¥372	+30.9%	¥36M ($230K)
2025-01-10	BUY	Market Buy	大田昭彦 Akihiko Ohta	passive	444.0K	¥353	+38.0%	¥157M ($1.0M)
2024-07-01	BUY	Market Buy	株式会社シンシア工務店 SINCERE KOUMUTEN CO., LTD.	passive	453.9K	¥428	+13.8%	¥194M ($1.3M)
2024-07-01	BUY	Market Buy	株式会社シンシア工務店 SINCERE KOUMUTEN CO., LTD.	passive	574.9K	¥428	+13.8%	¥52M ($335K)
2024-07-01	BUY	Market Buy	株式会社シンシア工務店 SINCERE KOUMUTEN CO., LTD.	passive	674.9K	¥428	+13.8%	¥43M ($275K)
2024-07-01	SELL	Market Buy	株式会社シンシア工務店 SINCERE KOUMUTEN CO., LTD.	passive	515.0K	¥428	-13.8%	¥68M ($441K)
2024-07-01	SELL	Market Buy	株式会社シンシア工務店 SINCERE KOUMUTEN CO., LTD.	passive	315.0K	¥428	-13.8%	¥86M ($552K)
2022-11-07	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	64.3K	¥552	+11.8%	¥28M ($180K)
2022-11-07	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	345.8K	¥552	+11.8%	¥35M ($227K)
2022-08-05	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	129.6K	¥749	+35.0%	¥22M ($139K)
2022-08-05	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	58.1K	¥749	-35.0%	¥2M ($13K)
2022-08-05	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	212.2K	¥749	+35.0%	¥45M ($291K)
2022-03-03	BUY	Market Buy	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	passive	31.9K	¥806	-39.6%	¥26M ($166K)
2022-03-03	BUY	Market Buy	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	passive	660.7K	¥806	-39.6%	¥505M ($3.3M)
2022-02-28	BUY	negotiated	株式会社北海道新聞社 Hokkaido Shimbun Co., Ltd.	strategic	43.6K	¥871	-44.1%	¥38M ($245K)
2022-02-28	BUY	negotiated	信濃毎日新聞株式会社 Shinano Mainichi Shimbun Co., Ltd.	strategic	87.3K	¥871	-44.1%	¥76M ($491K)
2022-02-28	BUY	negotiated	株式会社北國新聞社 Hokkoku Shimbun Co., Ltd.	strategic	94.3K	¥871	-44.1%	¥82M ($530K)
2022-02-28	BUY	negotiated	株式会社朝日新聞社 The Asahi Shimbun Company	strategic	187.8K	¥871	-44.1%	¥164M ($1.1M)
2022-02-28	BUY	negotiated	株式会社中日新聞社 Chunichi Shimbun Co., Ltd.	strategic	229.4K	¥871	-44.1%	¥200M ($1.3M)
2022-02-28	BUY	negotiated	株式会社読売新聞東京本社 The Yomiuri Shimbun	strategic	2.2M	¥871	-44.1%	¥1.9B ($12.3M)
2022-01-07	BUY	unknown	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	31.9K	¥977	-50.1%	¥31M ($201K)
2022-01-07	BUY	unknown	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	activist	3.5M	¥977	-50.1%	¥3.4B ($21.8M)
2021-12-10	BUY	Market Buy	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	31.9K	¥1,155	-57.8%	¥37M ($238K)
2021-12-10	BUY	unknown	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	activist	3.5M	¥1,155	-57.8%	¥41M ($267K)
2021-12-10	BUY	unknown	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	activist	3.5M	¥1,155	-57.8%	¥4.0B ($25.7M)
2021-12-10	BUY	unknown	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	31.9K	¥1,155	-57.8%	¥37M ($238K)
2021-12-10	BUY	unknown	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	31.9K	¥1,155	-57.8%	¥37M ($238K)
2021-12-10	BUY	unknown	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	31.9K	¥1,155	-57.8%	¥37M ($238K)
2021-12-10	BUY	Market Buy	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	activist	3.5M	¥1,155	-57.8%	¥41M ($267K)
2021-12-10	BUY	unknown	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	activist	3.5M	¥1,155	-57.8%	¥4.0B ($25.7M)
2021-12-06	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	115.2K	¥1,194	+59.2%	¥2M ($13K)
2021-12-06	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	409.7K	¥1,194	-59.2%	¥489M ($3.2M)
2021-11-19	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	116.8K	¥1,416	-65.6%	¥6M ($40K)
2021-11-19	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	409.7K	¥1,416	-65.6%	¥117M ($758K)
2021-09-13	BUY	unknown	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	31.9K	¥2,635	-81.5%	¥84M ($542K)
2021-09-13	BUY	Market Buy	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	31.9K	¥2,635	-81.5%	¥84M ($542K)
2021-09-13	BUY	Market Buy	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	activist	3.5M	¥2,635	-81.5%	¥299M ($1.9M)
2021-09-13	BUY	unknown	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	activist	3.4M	¥2,635	-81.5%	¥205M ($1.3M)
2021-08-23	BUY	Market Buy	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	31.9K	¥909	-46.4%	¥29M ($187K)
2021-08-23	BUY	Market Buy	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	activist	3.3M	¥909	-46.4%	¥140M ($906K)
2021-08-20	BUY	Market Buy	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	31.9K	¥920	-47.1%	¥29M ($189K)
2021-08-20	BUY	Market Buy	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	activist	3.2M	¥920	-47.1%	¥112M ($720K)
2021-08-18	SELL	Market Buy	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	31.9K	¥960	+49.3%	¥2.8B ($18.2M)
2021-08-18	BUY	Market Buy	アジアインベストメントファンド株式会社 Asia Investment Fund Co. Ltd.	activist	3.1M	¥960	-49.3%	¥117M ($757K)
2021-08-10	BUY	Market Buy	アジア開発キャピタル株式会社 Asian Development Capital Co., Ltd.	activist	29.9K	¥1,169	-58.3%	¥35M ($226K)

Showing the 50 most recent of 64 filings.

Frequently asked questions

Who has been buying Tokyo Kikai Seisakusho, Ltd. stock?: 15 distinct investors have filed 37 disclosed large-shareholding filings in Tokyo Kikai Seisakusho, Ltd. (6335), most recently on 2025-08-26. 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 Kikai Seisakusho, Ltd. have?: Tokyo Kikai Seisakusho, Ltd. has 37 buy-side and 9 sell-side disclosures on record, covering ¥4.3B ($27.9M) in total reported value, spanning 2021-07-20 to 2025-08-26.
Where does StockDrifts get Tokyo Kikai Seisakusho, 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 Tokyo Kikai Seisakusho, Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.