| 1947 |
Iwai Chemicals Company Ltd. is established in Nihonbashi-honcho, Chuo City, Tokyo |
| 1947-04-26 |
岩井化学薬品株式会社創立 |
| 1948 |
Iwamotocho Factory and Warehouse are established in Chiyoda City, Tokyo |
| 1948-10 |
岩本町工場および商品倉庫を設置 |
| 1963 |
Constructed Iwamotocho Factory building |
| 1963-11 |
岩本町工場社屋完成 |
| 1969 |
Constructed Matsunoki Warehouse and Employee Dormitory in Suginami City, Tokyo |
| 1969-07 |
松ノ木倉庫および社員寮完成 |
| 1973 |
Constructed and moved into New Headquarter |
| 1973-12 |
本社新社屋完成 |
| 1978 |
Computerized merchandise control is established |
| 1978-10 |
コンピューターによる商品管理を開始 |
| 1982 |
Tsukuba Branch is established in Tsukuba Science City, Ibaraki Pref. |
| 1982-02 |
筑波研究学園都市に営業所を開設 |
| 1984-01 |
本社に総合商品管理室を設置 |
| 1984 |
Distribution Office is established in the Headquarter |
| 1985-01 |
汎用小型コンピューター導入 |
| 1985 |
Computers are installed in the Headquarter |
| 1985 |
Technical, Marketing and Planning Division are established |
| 1985-03 |
学術・企画・開発部門を新設 |
| 1986 |
Purchasing and Distribution Division expanded |
| 1986-04 |
発注・仕入・商品管理部門の拡充 |
| 1988 |
Tama Branch is established in Kunitachi City, Tokyo |
| 1988-06 |
多摩営業所を国立市に開設 |
| 1989 |
Mishima Branch is established in Shizuoka Pref. |
| 1989-07 |
三島営業所を静岡県に開設 |
| 1990 |
Constructed New Distribution Center in Iwamotocho, Chiyoda City |
| 1990-06 |
千代田区岩本町に商品管理センタービル竣工 |
| 1992 |
Yokohama Branch is established in Yokohama City |
| 1992-08 |
横浜営業所を横浜市緑区に開設 |
| 1995 |
Tsukuba Branch relocated to Tokodai, Tsukuba City. |
| 1995-03 |
つくば市東光台研究工業団地に筑波営業所を移転 |
| 1998 |
Constructed Kanda 2nd Building in Iwamotocho |
| 1998 |
Started partnership with Chondrex, Inc. |
| 1999-02 |
千代田区岩本町に神田第二ビル竣工 |
| 1999-02 |
アメリカ Chondrex, Inc. と業務提携 |
| 2000 |
Iwai USA Inc. is established in San Jose, CA |
| 2000 |
Iwai USA Inc. became the majority shareholder of Chondrex, Inc. |
| 2000-02 |
アメリカ にIwai USA Inc.を設立 |
| 2000-11 |
アメリカ Chondrex, Inc. の経営権を取得 |
| 2002 |
Sales department is centralized in Kanda 2nd Building |
| 2002-04 |
本社営業部門を神田第二ビルに集約 |
| 2004 |
Kashiwa Branch is established in Kashiwa City, Chiba Pref. |
| 2004-10 |
柏営業所を千葉県柏市に開設 |
| 2006 |
Iwai North America Inc. is established in Burlingame, CA |
| 2006-10 |
アメリカ にIwai North America Inc.を設立 |
| 2008 |
Iwai USA Inc. merged out to Iwai North America Inc. |
| 2008-10 |
Iwai North America Inc.がIwai USA Inc.を吸収合併 |
| 2013 |
Tama Branch relocated to Tachikawa City, Tokyo |
| 2013-11 |
立川市に多摩営業所を移転 |
| 2021-01 |
川崎市に横浜営業所を移転、川崎営業所を開設 |
| 2021 |
Yokohama Branch relocated to Kawasaki City, Kanagawa and established as Kawasaki Branch |
