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Tomoegawa Co., Ltd. 3878

Company
株式会社巴川製紙所Tomoegawa Co., Ltd.
Investors
6
Buys
6
Total Value
¥1.4B ($9.0M)
Avg Return
+22.00%
Last Filing
2026-01-23

Tomoegawa Co., Ltd. (3878) has 6 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥1.4B ($9.0M) in reported transaction value. The earliest filing StockDrifts holds for Tomoegawa Co., Ltd. is dated 2022-04-01; the most recent is 2026-01-23. 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 +22.00%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-01-23BUYunknown
巴川コーポレーション取引先持株会 理事長 三瓶 悦男
SANPEI ETSUO
other520.0K¥798+12.2%¥415M ($2.7M)
2025-08-22BUYunknown
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
passive297.8K¥722+24.0%¥213M ($1.4M)
2025-08-22SELLunknown
株式会社 三井住友銀行
Sumitomo Mitsui Banking Corporation
other0¥722-24.0%¥240M ($1.5M)
2024-02-19BUYMarket Buy
株式会社井上ホールディングス
Inoue Holdings Corporation
passive611.7K¥814+9.9%¥498M ($3.2M)
2023-10-06SELLunknown
TOPPANホールディングス株式会社
TOPPAN Holdings Inc.
strategic1.1M¥661-35.4%¥73M ($471K)
2023-01-11BUYMarket 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
passive386.0K¥676+32.4%¥90M ($578K)
2023-01-11BUYMarket Buy
株式会社 三井住友銀行
Sumitomo Mitsui Banking Corporation
other395.9K¥676+32.4%¥268M ($1.7M)
2022-08-05BUYMarket 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
passive254.5K¥706+26.8%¥180M ($1.2M)
2022-08-05BUYMarket Buy
株式会社 三井住友銀行
Sumitomo Mitsui Banking Corporation
other395.9K¥706+26.8%¥280M ($1.8M)
2022-04-01SELLMarket Buy
栄紙業株式会社
SAKAE PAPER CO.LTD.
passive3.3M¥844-6.0%¥136M ($877K)
2022-04-01BUYMarket Buy
栄紙業株式会社
SAKAE PAPER CO.LTD.
passive3.3M¥844+6.0%¥136M ($877K)

Frequently asked questions

Who has been buying Tomoegawa Co., Ltd. stock?
6 distinct investors have filed 6 disclosed large-shareholding filings in Tomoegawa Co., Ltd. (3878), most recently on 2026-01-23. 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 Tomoegawa Co., Ltd. have?
Tomoegawa Co., Ltd. has 6 buy-side and 3 sell-side disclosures on record, covering ¥1.4B ($9.0M) in total reported value, spanning 2022-04-01 to 2026-01-23.
Where does StockDrifts get Tomoegawa 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 Tomoegawa Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.