Who has been buying Eiwa Corporation stock?

3 distinct investors have filed 8 disclosed large-shareholding filings in Eiwa Corporation (9857), most recently on 2025-09-29. 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 Eiwa Corporation have?

Eiwa Corporation has 8 buy-side and 1 sell-side disclosures on record, covering ¥604M ($3.9M) in total reported value, spanning 2021-06-03 to 2025-09-29.

Where does StockDrifts get Eiwa Corporation 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.

Eiwa Corporation 9857

Company

英和株式会社Eiwa Corporation

Investors

Buys

Total Value

¥604M ($3.9M)

Avg Return

+72.08%

Last Filing

2025-09-29

Eiwa Corporation (9857) has 8 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥604M ($3.9M) in reported transaction value. The earliest filing StockDrifts holds for Eiwa Corporation is dated 2021-06-03; the most recent is 2025-09-29. 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 +72.08%, 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
2025-09-29	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	171.6K	¥2,341	+12.0%	¥402M ($2.6M)
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	473.4K	¥2,341	+12.0%	¥1.1B ($7.1M)
2025-09-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	360.1K	¥2,341	+12.0%	¥56M ($362K)
2025-05-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	336.4K	¥2,176	+20.5%	¥141M ($908K)
2025-05-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	473.4K	¥2,176	+20.5%	¥1.0B ($6.6M)
2025-05-26	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	171.6K	¥2,176	+20.5%	¥373M ($2.4M)
2024-02-28	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	271.7K	¥2,185	+20.0%	¥146M ($939K)
2024-02-28	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	171.6K	¥2,185	+20.0%	¥375M ($2.4M)
2024-02-28	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	473.4K	¥2,185	+20.0%	¥1.0B ($6.7M)
2023-08-07	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	171.6K	¥1,643	+59.6%	¥282M ($1.8M)
2023-08-07	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	205.3K	¥1,643	+59.6%	¥106M ($686K)
2023-08-07	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	473.4K	¥1,643	+59.6%	¥778M ($5.0M)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	171.6K	¥1,240	+111.5%	¥213M ($1.4M)
2022-01-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	140.5K	¥1,240	+111.5%	¥26M ($166K)
2022-01-18	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	473.4K	¥1,240	-111.5%	¥213M ($1.4M)
2021-11-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	119.7K	¥1,140	+130.0%	¥14M ($90K)
2021-11-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	645.0K	¥1,140	+130.0%	¥735M ($4.7M)
2021-10-22	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	107.7K	¥1,275	+105.7%	¥84M ($543K)
2021-10-22	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	645.0K	¥1,275	+105.7%	¥822M ($5.3M)
2021-06-03	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	41.2K	¥1,206	+117.4%	¥50M ($321K)
2021-06-03	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	645.0K	¥1,206	+117.4%	¥31M ($201K)

Frequently asked questions

Who has been buying Eiwa Corporation stock?: 3 distinct investors have filed 8 disclosed large-shareholding filings in Eiwa Corporation (9857), most recently on 2025-09-29. 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 Eiwa Corporation have?: Eiwa Corporation has 8 buy-side and 1 sell-side disclosures on record, covering ¥604M ($3.9M) in total reported value, spanning 2021-06-03 to 2025-09-29.
Where does StockDrifts get Eiwa Corporation 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 Eiwa Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.