Who has been buying Tokyo Energy & Systems Inc. stock?

4 distinct investors have filed 10 disclosed large-shareholding filings in Tokyo Energy & Systems Inc. (1945), most recently on 2026-03-27. 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 Energy & Systems Inc. have?

Tokyo Energy & Systems Inc. has 10 buy-side and 10 sell-side disclosures on record, covering ¥5.7B ($37.1M) in total reported value, spanning 2021-07-13 to 2026-03-27.

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 Energy & Systems Inc. 1945

Company

株式会社東京エネシスTokyo Energy & Systems Inc.

Investors

Buys

Total Value

¥5.7B ($37.1M)

Avg Return

+55.69%

Last Filing

2026-03-27

Tokyo Energy & Systems Inc. (1945) has 10 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥5.7B ($37.1M) in reported transaction value. The earliest filing StockDrifts holds for Tokyo Energy & Systems Inc. is dated 2021-07-13; the most recent is 2026-03-27. Across these filings the average return since disclosure is +55.69%, 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
2026-09-08	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.3M	¥2,130	-0.7%	¥403M ($2.6M)
2026-03-27	SELL	Market Buy	株式会社UH Partners 2	unknown	0	¥1,815	-18.2%	¥446M ($2.9M)
2026-03-27	SELL	Market Buy	光通信株式会社	passive	2.5M	¥1,815	-18.2%	¥193M ($1.2M)
2026-03-10	BUY	Market Buy	光通信株式会社	passive	2.6M	¥1,795	+19.5%	¥233M ($1.5M)
2026-03-10	SELL	Market Buy	株式会社UH Partners 2	passive	246.0K	¥1,795	-19.5%	¥769M ($5.0M)
2026-03-04	SELL	unknown	東京電力ホールディングス株式会社 Tokyo Electric Power Company Holdings, Incorporated	corporate	6.4M	¥1,749	-22.6%	¥3.7B ($24.2M)
2026-03-04	BUY	Market Buy	光通信株式会社	passive	2.6M	¥1,749	-	-
2026-03-04	SELL	Market Buy	株式会社UH Partners 2	passive	711.4K	¥1,749	-22.6%	¥740M ($4.8M)
2026-02-20	BUY	Market Buy	光通信株式会社	passive	2.6M	¥1,921	-	-
2026-02-20	SELL	Market Buy	株式会社UH Partners 2	passive	1.1M	¥1,921	-11.7%	¥578M ($3.7M)
2026-02-20	SELL	Market Buy	株式会社エスアイエル	unknown	0	¥1,921	-11.7%	¥168M ($1.1M)
2026-02-04	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	4.1M	¥1,873	-14.5%	¥701M ($4.5M)
2026-01-15	BUY	Market Buy	光通信株式会社	passive	2.6M	¥2,037	-	-
2026-01-15	BUY	Market Buy	株式会社UH Partners 2	passive	1.4M	¥2,037	-	-
2026-01-15	SELL	Market Buy	株式会社エスアイエル	passive	459.9K	¥2,037	-5.3%	¥748M ($4.8M)
2025-09-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥1,736	-	-
2025-09-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.4M	¥1,736	+23.6%	¥267M ($1.7M)
2025-09-26	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	824.0K	¥1,736	-	-
2025-01-22	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥1,054	+103.5%	¥166M ($1.1M)
2025-01-22	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.3M	¥1,054	+103.5%	¥151M ($975K)
2025-01-22	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	824.0K	¥1,054	+103.5%	¥55M ($357K)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	824.0K	¥969	-	¥798M ($5.2M)
2022-01-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.2M	¥969	+121.4%	¥7M ($47K)
2022-01-18	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥969	-121.4%	¥798M ($5.1M)
2021-11-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.2M	¥1,044	+105.5%	¥19M ($125K)
2021-11-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.2M	¥1,044	+105.5%	¥19M ($125K)
2021-11-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	3.4M	¥1,044	-	-
2021-11-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	3.4M	¥1,044	-	-
2021-11-15	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	3.4M	¥1,091	-	-
2021-11-15	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.2M	¥1,091	+96.6%	¥411M ($2.6M)
2021-07-13	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	3.4M	¥978	-	-
2021-07-13	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	810.0K	¥978	+119.3%	¥364M ($2.4M)

Frequently asked questions

Who has been buying Tokyo Energy & Systems Inc. stock?: 4 distinct investors have filed 10 disclosed large-shareholding filings in Tokyo Energy & Systems Inc. (1945), most recently on 2026-03-27. 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 Energy & Systems Inc. have?: Tokyo Energy & Systems Inc. has 10 buy-side and 10 sell-side disclosures on record, covering ¥5.7B ($37.1M) in total reported value, spanning 2021-07-13 to 2026-03-27.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.