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Japan Reliance Service Corporation 4664

Company
株式会社アール・エス・シーJapan Reliance Service Corporation
Investors
2
Buys
1
Total Value
¥231M ($1.5M)
Avg Return
-24.88%
Last Filing
2025-12-11

Japan Reliance Service Corporation (4664) has 1 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 2 distinct investors. Together those filings cover ¥231M ($1.5M) in reported transaction value. The earliest filing StockDrifts holds for Japan Reliance Service Corporation is dated 2024-08-19; the most recent is 2025-12-11. 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 -24.88%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2025-12-11BUYnegotiated
ソフトバンクロボティクス株式会社
SoftBank Robotics Corp.
strategic180.0K¥1,286-24.9%¥231M ($1.5M)
2024-08-19SELLnegotiated
株式会社テーオーシー
TOC Co., Ltd.
strategic100.0K¥485-99.2%¥39M ($250K)
2024-08-19BUYnegotiated
株式会社テーオーシー
TOC Co., Ltd.
strategic100.0K¥485+99.2%¥39M ($250K)

Frequently asked questions

Who has been buying Japan Reliance Service Corporation stock?
2 distinct investors have filed 1 disclosed large-shareholding filings in Japan Reliance Service Corporation (4664), most recently on 2025-12-11. 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 Japan Reliance Service Corporation have?
Japan Reliance Service Corporation has 1 buy-side and 1 sell-side disclosures on record, covering ¥231M ($1.5M) in total reported value, spanning 2024-08-19 to 2025-12-11.
Where does StockDrifts get Japan Reliance Service 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 Japan Reliance Service Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.