StockDriftsStockDriftsYasuhara Chemical Co.,Ltd. (4957) has 15 disclosed large-shareholding filings and 16 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥2.4B ($15.7M) in reported transaction value. The earliest filing StockDrifts holds for Yasuhara Chemical Co.,Ltd. is dated 2021-10-22; the most recent is 2026-01-13. Across these filings the average return since disclosure is +72.38%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Purpose | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-01-13 | BUY | unknown | YAHO株式会社 | activist | 5.2M | ¥1,367.32 | - | - |
| 2026-01-13 | BUY | unknown | ワイエス興産有限会社 | strategic | 1.2M | ¥1,367.32 | - | - |
| 2026-01-13 | BUY | unknown | 沖津 弘之 | strategic | 145.8K | ¥1,367.32 | - | - |
| 2026-01-13 | BUY | unknown | 沖津 妙子 | strategic | 466.2K | ¥1,367.32 | - | - |
| 2026-01-13 | BUY | unknown | 原田 桂子 | strategic | 139.2K | ¥1,367.32 | - | - |
| 2026-01-13 | BUY | unknown | 安原 禎二 | activist | 1.2M | ¥1,367.32 | - | - |
| 2025-12-23 | SELL | negotiated | 中銀リース株式会社 | strategic | 0 | ¥1,367.32 | -0.5% | ¥36M ($232K) |
| 2025-12-23 | SELL | unknown | ヤスハラケミカル取引先持株会 理事長 田中正治 SYOJI TANAKA | unknown | 0 | ¥1,367.32 | -0.5% | ¥1.2B ($8.0M) |
| 2025-12-23 | SELL | negotiated | 株式会社中国銀行 | strategic | 0 | ¥1,367.32 | -0.5% | ¥586M ($3.8M) |
| 2025-12-23 | SELL | unknown | 株式会社中国銀行 | unknown | 0 | ¥1,367.32 | -0.5% | ¥700M ($4.5M) |
| 2025-12-23 | SELL | unknown | 中銀リース株式会社 | unknown | 0 | ¥1,367.32 | -0.5% | ¥43M ($277K) |
| 2025-12-23 | SELL | unknown | 株式会社中国銀行 | unknown | 0 | ¥1,367.32 | -0.5% | ¥700M ($4.5M) |
| 2025-12-23 | SELL | unknown | 中銀リース株式会社 | unknown | 0 | ¥1,367.32 | -0.5% | ¥43M ($277K) |
| 2025-12-23 | SELL | unknown | 株式会社中国銀行 | unknown | 0 | ¥1,367.32 | -0.5% | ¥700M ($4.5M) |
| 2025-12-23 | SELL | unknown | 中銀リース株式会社 | unknown | 0 | ¥1,367.32 | -0.5% | ¥43M ($277K) |
| 2025-12-18 | BUY | unknown | 沖津 妙子 | strategic | 466.2K | ¥1,367.32 | - | - |
| 2025-12-18 | BUY | unknown | YAHO株式会社 | activist | 5.2M | ¥1,367.32 | - | - |
| 2025-12-18 | BUY | unknown | 安原 禎二 | activist | 1.2M | ¥1,367.32 | - | - |
| 2025-12-18 | BUY | unknown | ワイエス興産有限会社 | strategic | 1.2M | ¥1,367.32 | - | - |
| 2025-12-18 | BUY | unknown | 沖津 弘之 | strategic | 145.8K | ¥1,367.32 | - | - |
| 2025-12-18 | BUY | unknown | 原田 桂子 | strategic | 139.2K | ¥1,367.32 | - | - |
| 2025-12-17 | BUY | unknown | YAHO株式会社 | activist | 5.2M | ¥1,367.32 | +0.5% | ¥7.1B ($46.0M) |
| 2025-12-17 | BUY | unknown | 安原 禎二 | activist | 1.2M | ¥1,367.32 | +0.5% | - |
| 2025-12-17 | BUY | unknown | ワイエス興産有限会社 | strategic | 1.2M | ¥1,367.32 | +0.5% | - |
| 2025-12-17 | BUY | unknown | 沖津 弘之 | strategic | 145.8K | ¥1,367.32 | +0.5% | - |
| 2025-12-17 | BUY | unknown | 沖津 妙子 | strategic | 466.2K | ¥1,367.32 | +0.5% | ¥55M ($354K) |
| 2025-12-17 | BUY | unknown | 原田 桂子 | strategic | 139.2K | ¥1,367.32 | +0.5% | - |
| 2025-11-06 | SELL | Market Buy | 沖津 弘之 Hiroyuki Okitsu | strategic | 145.8K | ¥1,385.33 | +0.8% | ¥15M ($97K) |
| 2025-11-06 | BUY | unknown | 有限会社マキ MAKI | strategic | 403.7K | ¥1,385.33 | - | - |
| 2025-11-06 | BUY | unknown | 槇本 通夫 Michio Makimoto | strategic | 178.0K | ¥1,385.33 | - | - |
| 2025-11-06 | SELL | unknown | ワイエス興産有限会社 YS Industries | strategic | 1.2M | ¥1,385.33 | +0.8% | ¥23M ($145K) |
| 2025-11-06 | SELL | unknown | 安原 禎二 Teiji Yasuhara | activist | 1.2M | ¥1,385.33 | +0.8% | ¥6M ($39K) |
| 2025-11-06 | SELL | unknown | 沖津 弘之 Hiroyuki Okitsu | strategic | 145.8K | ¥1,385.33 | +0.8% | ¥15M ($97K) |
| 2025-11-06 | BUY | unknown | 沖津 妙子 Taeko Okitsu | strategic | 506.2K | ¥1,385.33 | -0.8% | ¥60M ($388K) |
| 2025-11-06 | BUY | unknown | 原田 桂子 Keiko Harada | strategic | 139.2K | ¥1,385.33 | - | - |
| 2025-11-06 | BUY | Market Buy | 沖津 妙子 Taeko Okitsu | strategic | 506.2K | ¥1,385.33 | -0.8% | ¥60M ($388K) |
| 2025-11-06 | BUY | Market Buy | 原田 桂子 Keiko Harada | strategic | 139.2K | ¥1,385.33 | - | - |
| 2024-02-15 | BUY | unknown | 有限会社マキ MAKI | strategic | 403.7K | ¥714.17 | - | - |
| 2024-02-15 | SELL | unknown | 槇本 通夫 Michio Makimoto | strategic | 178.0K | ¥714.17 | -92.4% | ¥214M ($1.4M) |
| 2023-09-15 | BUY | unknown | 有限会社マキ MAKI | strategic | 403.7K | ¥566.13 | - | - |
| 2023-09-15 | BUY | unknown | 槇本 通夫 Michio Makimoto | strategic | 478.0K | ¥566.13 | +142.7% | ¥170M ($1.1M) |
| 2023-08-08 | BUY | unknown | 有限会社マキ MAKI | strategic | 403.7K | ¥549.13 | - | - |
| 2023-08-08 | BUY | unknown | 有限会社マキ MAKI | strategic | 403.7K | ¥549.13 | - | - |
| 2023-08-08 | BUY | unknown | 槇本 通夫 Michio Makimoto | strategic | 478.0K | ¥549.13 | +150.2% | ¥165M ($1.1M) |
| 2023-08-08 | BUY | unknown | 槇本 通夫 Michio Makimoto | strategic | 178.0K | ¥549.13 | - | - |
| 2023-02-15 | SELL | unknown | 敷田 憲治 SHIKITA KENJI | unknown | 0 | ¥504.12 | -172.6% | ¥4M ($23K) |
| 2023-02-15 | BUY | unknown | 有限会社 宗江 Munoe Co., Ltd. | unknown | 373.7K | ¥504.12 | - | - |
| 2022-11-11 | SELL | unknown | ヤスハラケミカル株式会社 YASUHARA CHEMICAL CO.,LTD. | unknown | 0 | ¥521.12 | -163.7% | ¥294M ($1.9M) |
| 2022-10-07 | BUY | negotiated | 株式会社中国銀行 The Chugoku Bank, Limited. | strategic | 511.5K | ¥525.12 | +161.7% | ¥269M ($1.7M) |
| 2022-10-07 | BUY | negotiated | 株式会社中国銀行 The Chugoku Bank, Limited. | strategic | 511.5K | ¥525.12 | +161.7% | ¥269M ($1.7M) |
Showing the 50 most recent of 53 filings.
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.