StockDriftsStockDriftsCyberStep, Inc. (3810) has 21 disclosed large-shareholding filings and 79 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥20.1B ($129.9M) in reported transaction value. The earliest filing StockDrifts holds for CyberStep, Inc. is dated 2021-03-26; the most recent is 2026-04-06. 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 -32.62%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Purpose | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-06-05 | BUY | unknown | 株式会社Tiger Japan Investment Tiger Japan Investment Co., Ltd. | other | 8.8M | ¥176 | +6.8% | ¥740M ($4.8M) |
| 2026-06-05 | BUY | subscription | 安達 礼 Adachi Aya | other | 24.8M | ¥176 | +6.8% | ¥663M ($4.3M) |
| 2026-06-05 | BUY | unknown | 安達 礼 Adachi Aya | other | 22.9M | ¥176 | +6.8% | ¥236M ($1.5M) |
| 2026-06-05 | SELL | unknown | 株式会社Tiger Japan Investment Tiger Japan Investment Co., Ltd. | other | 8.8M | ¥176 | -6.8% | ¥740M ($4.8M) |
| 2026-06-05 | SELL | subscription | 安達 礼 Adachi Aya | other | 24.8M | ¥176 | -6.8% | ¥663M ($4.3M) |
| 2026-06-05 | SELL | unknown | 安達 礼 Adachi Aya | other | 22.9M | ¥176 | -6.8% | ¥236M ($1.5M) |
| 2026-04-06 | SELL | subscription | 安達 礼 Adachi Aya | other | 24.8M | ¥241 | +9.1% | ¥193M ($1.2M) |
| 2026-03-17 | BUY | unknown | 山下 卓宏 Takahiro Yamashita | other | 2.1M | ¥267 | -11.2% | ¥507M ($3.3M) |
| 2026-03-17 | SELL | unknown | 山下 卓宏 Takahiro Yamashita | other | 2.1M | ¥267 | +11.2% | ¥507M ($3.3M) |
| 2026-01-09 | BUY | unknown | 山下 卓宏 Yamashita Takahiro | other | 4.0M | ¥320 | -25.9% | ¥1.3B ($8.3M) |
| 2026-01-09 | BUY | unknown | 山下 卓宏 Yamashita Takahiro | other | 4.0M | ¥320 | -25.9% | ¥1.3B ($8.3M) |
| 2026-01-06 | BUY | Market Buy | 合同会社つながる Tsunagaru LLC | passive | 10.0M | ¥318 | -25.5% | ¥1.3B ($8.5M) |
| 2026-01-06 | SELL | Market Buy | 合同会社つながる Tsunagaru LLC | passive | 10.0M | ¥318 | +25.5% | ¥1.3B ($8.5M) |
| 2026-01-06 | SELL | unknown | 株式会社Tiger Japan Investment Tiger Japan Investment Co., Ltd. | other | 11.4M | ¥318 | +25.5% | ¥162M ($1.0M) |
| 2026-01-06 | SELL | unknown | 安達 礼 Adachi Aya | other | 26.1M | ¥318 | +25.5% | ¥86M ($552K) |
| 2026-01-06 | BUY | unknown | 株式会社Tiger Japan Investment Tiger Japan Investment Co., Ltd. | other | 11.4M | ¥318 | -25.5% | ¥162M ($1.0M) |
| 2026-01-05 | BUY | unknown | 株式会社Tiger Japan Investment Tiger Japan Investment Co., Ltd. | other | 11.4M | ¥322 | -26.4% | ¥3.7B ($23.6M) |
| 2026-01-05 | BUY | Market Buy | 合同会社つながる Tsunagaru LLC | passive | 14.0M | ¥322 | -26.4% | ¥4.5B ($29.1M) |
| 2026-01-05 | BUY | unknown | 株式会社Tiger Japan Investment Tiger Japan Investment Co., Ltd. | other | 11.4M | ¥322 | -26.4% | ¥3.7B ($23.6M) |
| 2026-01-05 | BUY | unknown | 名越 美嗣 Nagoshi Yoshitsugu | other | 6.4M | ¥322 | -26.4% | ¥2.1B ($13.3M) |
| 2026-01-05 | BUY | unknown | 名越 美嗣 Nagoshi Yoshitsugu | other | 6.4M | ¥322 | -26.4% | ¥2.1B ($13.3M) |
| 2026-01-05 | BUY | Market Buy | 合同会社つながる Tsunagaru LLC | passive | 14.0M | ¥322 | -26.4% | ¥4.5B ($29.1M) |
| 2026-01-05 | BUY | Market Buy | 安達 礼 Adachi Aya | other | 26.1M | ¥322 | -26.4% | ¥5.7B ($37.0M) |
| 2025-12-05 | SELL | unknown | 佐藤 類 | strategic | 924.7K | ¥294 | +19.4% | ¥219M ($1.4M) |
| 2025-12-05 | SELL | unknown | ロードランナー株式会社 | activist | 517.4K | ¥294 | +19.4% | ¥123M ($791K) |
| 2025-08-25 | SELL | unknown | 安達 礼 Adachi Aya | other | 2.1M | ¥379 | +37.5% | ¥212M ($1.4M) |
| 2025-08-22 | BUY | unknown | 安達 礼 Adachi Aya | other | 2.3M | ¥371 | -36.1% | ¥91M ($587K) |
| 2025-08-22 | BUY | unknown | 安達 礼 Adachi Aya | other | 2.3M | ¥371 | -36.1% | ¥866M ($5.6M) |
| 2025-08-14 | BUY | unknown | 安達 礼 Adachi Aya | other | 2.6M | ¥345 | -31.3% | ¥890M ($5.7M) |
| 2025-08-14 | BUY | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 5.5M | ¥345 | -31.3% | ¥3M ($21K) |
| 2025-08-14 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 5.2M | ¥345 | +31.3% | ¥97M ($623K) |
| 2025-08-14 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 5.5M | ¥345 | +31.3% | ¥3M ($21K) |
| 2025-08-14 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 5.6M | ¥345 | +31.3% | ¥71M ($460K) |
| 2025-08-14 | BUY | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 5.6M | ¥345 | -31.3% | ¥71M ($460K) |
| 2025-08-14 | BUY | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 5.2M | ¥345 | -31.3% | ¥97M ($623K) |
| 2025-07-28 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 5.8M | ¥326 | +27.3% | ¥60M ($389K) |
| 2025-07-28 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 6.3M | ¥326 | +27.3% | ¥75M ($485K) |
| 2025-07-28 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 6.6M | ¥326 | +27.3% | ¥8M ($50K) |
| 2025-07-28 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 6.6M | ¥326 | +27.3% | ¥79M ($510K) |
| 2025-07-28 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 6.0M | ¥326 | +27.3% | ¥66M ($423K) |
| 2025-07-28 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 6.9M | ¥326 | +27.3% | ¥170M ($1.1M) |
| 2025-07-08 | BUY | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 7.6M | ¥301 | -21.3% | ¥2.3B ($14.7M) |
| 2025-07-08 | BUY | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 7.6M | ¥301 | -21.3% | ¥17M ($112K) |
| 2025-07-08 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 7.6M | ¥301 | +21.3% | ¥17M ($109K) |
| 2025-06-02 | SELL | unknown | ロードランナー株式会社 Road Runner Co., Ltd. | activist | 517.4K | ¥300 | +21.0% | ¥3M ($21K) |
| 2025-06-02 | SELL | unknown | 佐藤 類 SATO Rui | strategic | 924.7K | ¥300 | +21.0% | ¥5M ($32K) |
| 2025-05-28 | SELL | unknown | ロードランナー株式会社 Road Runner Co., Ltd. | activist | 517.4K | ¥295 | +19.7% | ¥23M ($148K) |
| 2025-05-28 | SELL | unknown | 佐藤 類 SATO Rui | strategic | 924.7K | ¥295 | +19.7% | ¥41M ($264K) |
| 2025-05-20 | BUY | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 7.6M | ¥292 | -18.8% | ¥2.2B ($14.4M) |
| 2025-05-20 | SELL | Market Buy | 株式会社チェンバーマネイジメント 代表取締役 杉山啓之 Chamber Management Co.,Ltd. | passive | 7.1M | ¥292 | +18.8% | ¥23M ($146K) |
Showing the 50 most recent of 189 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 CyberStep, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.