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BENEFIT JAPAN Co., Ltd. 3934

Company
株式会社ベネフィットジャパンBENEFIT JAPAN Co., Ltd.
Investors
16
Buys
39
Total Value
¥3.9B ($25.5M)
Avg Return
+12.12%
Last Filing
2026-04-22

BENEFIT JAPAN Co., Ltd. (3934) has 39 disclosed large-shareholding filings and 62 disclosed disposals on record, filed by 16 distinct investors. Together those filings cover ¥3.9B ($25.5M) in reported transaction value. The earliest filing StockDrifts holds for BENEFIT JAPAN Co., Ltd. is dated 2021-04-07; the most recent is 2026-04-22. Across these filings the average return since disclosure is +12.12%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-05-19SELLunknown
有限会社サクマジャパン
strategic1.3M¥2,161-8.5%¥1M ($8K)
2026-05-19BUYunknown
佐久間 寛
activist1.3M¥2,161--
2026-05-19SELLunknown
有限会社サクマジャパン
strategic1.3M¥2,161-8.5%¥1M ($8K)
2026-05-19BUYunknown
佐久間 寛
activist1.3M¥2,161--
2026-04-22SELLunknown
みずほ証券 株式会社
other450.0K¥1,920-22.1%¥14M ($90K)
2026-04-22SELLunknown
アセットマネジメントOne株式会社
unknown0¥1,920-22.1%¥13M ($82K)
2026-04-02BUYMarket Buy
佐久間 寛
activist1.3M¥1,801+30.2%¥2M ($14K)
2026-04-02SELLMarket Buy
有限会社サクマジャパン
strategic1.3M¥1,801-30.2%¥8M ($49K)
2026-04-02BUYMarket Buy
佐久間 範子
strategic45.0K¥1,801--
2026-04-02BUYMarket Buy
佐久間 寛
activist1.3M¥1,801+30.2%¥2M ($14K)
2026-04-02SELLMarket Buy
有限会社サクマジャパン
strategic1.3M¥1,801-30.2%¥8M ($49K)
2026-04-02BUYMarket Buy
佐久間 範子
strategic45.0K¥1,801--
2026-03-24BUYMarket Buy
光通信株式会社
passive502.9K¥1,940--
2026-03-24BUYMarket Buy
株式会社UH Partners 2
passive411.6K¥1,940--
2026-03-24BUYMarket Buy
株式会社エスアイエル
passive97.2K¥1,940--
2026-03-24BUYMarket Buy
株式会社エヌオーアイ
passive447.1K¥1,940--
2026-03-24BUYMarket Buy
株式会社アイビー
passive131.7K¥1,940--
2026-03-24SELLMarket Buy
株式会社UH5
unknown0¥1,940-20.9%¥857M ($5.5M)
2026-03-24BUYMarket Buy
株式会社UH6
passive441.8K¥1,940-¥857M ($5.5M)
2026-03-24BUYMarket Buy
株式会社UH Partners 3
passive502.9K¥1,940--
2026-03-06BUYunknown
有限会社サクマジャパン
strategic1.3M¥2,029--
2026-03-06BUYunknown
佐久間 範子
strategic45.0K¥2,029--
2026-03-06SELLunknown
佐久間 寛
activist1.3M¥2,029-15.6%¥1M ($8K)
2025-12-23SELLMarket Buy
光通信株式会社
passive502.9K¥1,760-33.2%¥2M ($14K)
2025-12-23BUYMarket Buy
株式会社UH Partners 2
passive411.6K¥1,760--
2025-12-23SELLMarket Buy
株式会社UH Partners 3
passive502.9K¥1,760-33.2%¥2M ($14K)
2025-12-23BUYMarket Buy
株式会社エスアイエル
passive97.2K¥1,760--
2025-12-23SELLMarket Buy
株式会社エヌオーアイ
passive447.1K¥1,760-33.2%¥1M ($7K)
2025-12-23BUYMarket Buy
株式会社アイビー
passive131.7K¥1,760--
2025-12-23SELLMarket Buy
株式会社UH5
passive441.8K¥1,760-33.2%¥1M ($7K)
2025-10-03SELLunknown
佐久間 寛
sakuma hiroshi
activist1.3M¥1,923-21.9%¥3M ($22K)
2025-10-03SELLunknown
有限会社サクマジャパン
Sakuma Japan Ltd.
strategic1.3M¥1,923-21.9%¥3M ($22K)
2025-10-03BUYunknown
佐久間 範子
Noriko Sakuma
strategic45.0K¥1,923--
2025-09-26BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive502.9K¥1,952--
2025-09-26BUYMarket Buy
株式会社UH Partners 2
UH Partners 2, Inc.
passive411.6K¥1,952--
2025-09-26BUYMarket Buy
株式会社UH Partners 3
UH Partners 3 Co., Ltd.
passive502.9K¥1,952--
2025-09-26BUYMarket Buy
株式会社エスアイエル
SIL Co., Ltd.
passive97.2K¥1,952--
2025-09-26BUYMarket Buy
株式会社エヌオーアイ
NIO Co., Ltd.
passive447.1K¥1,952--
2025-09-26BUYMarket Buy
株式会社アイビー
IB, Inc.
passive131.7K¥1,952--
2025-09-26BUYMarket Buy
株式会社UH5
UH5 Co., Ltd.
passive441.8K¥1,952--
2025-06-06BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive502.9K¥1,849--
2025-06-06SELLMarket Buy
株式会社UH Partners 2
UH Partners 2, Inc.
passive411.6K¥1,849-26.8%¥170M ($1.1M)
2025-06-06BUYMarket Buy
株式会社UH Partners 3
UH Partners 3 Co., Ltd.
passive502.9K¥1,849--
2025-06-06BUYMarket Buy
株式会社エスアイエル
SIL Co., Ltd.
passive97.2K¥1,849--
2025-06-06BUYMarket Buy
株式会社エヌオーアイ
NIO Co., Ltd.
passive447.1K¥1,849--
2025-06-06BUYMarket Buy
株式会社アイビー
IB, Inc.
passive131.7K¥1,849+26.8%¥169M ($1.1M)
2025-06-06BUYMarket Buy
株式会社UH5
UH5 Co., Ltd.
passive441.8K¥1,849--
2025-04-30SELLMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive502.9K¥1,117-109.9%¥671K ($4K)
2025-04-30SELLMarket Buy
株式会社UH Partners 2
UH Partners 2, Inc.
passive502.9K¥1,117-109.9%¥671K ($4K)
2025-04-30SELLMarket Buy
株式会社UH Partners 3
UH Partners 3 Co., Ltd.
passive502.9K¥1,117-109.9%¥671K ($4K)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying BENEFIT JAPAN Co., Ltd. stock?
16 distinct investors have filed 39 disclosed large-shareholding filings in BENEFIT JAPAN Co., Ltd. (3934), most recently on 2026-04-22. 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 BENEFIT JAPAN Co., Ltd. have?
BENEFIT JAPAN Co., Ltd. has 39 buy-side and 62 sell-side disclosures on record, covering ¥3.9B ($25.5M) in total reported value, spanning 2021-04-07 to 2026-04-22.
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.