| 1947 |
東京ボート（株）創業 高速舶用機関開発、販売を開始 |
| 1947 |
Tokyo Boat Limited founded as a manufacturer, distributor, and repairer of marine diesel engines, marine generator sets and marine gears. |
| 1951 |
DA45 88-horsepower, compact, high-speed engine developed in first cooperative project with Isuzu Motors Limited. |
| 1972 |
いすゞ自動車資本参加 いすゞマリン製造（株）に社名変更 |
| 1972 |
Isuzu Motors Limited injects capital and company name changed from Tokyo Boat Limited to Isuzu Marine Engine Inc. |
| 1974 |
マリンエンジン生産工場として、現千葉工場竣工 |
| 1974 |
Construction completed on what is today the Chiba Plant, where marine engines are made. |
| 2003 |
いすゞ自動車のマリンエンジン販売権を当社へ移管 |
| 2003 |
Dealership rights for Isuzu Motors' marine engines transferred to the company. |
| 2007 |
国内初コモンレール式舶用機関開発、販売 |
| 2007 |
Developed first common-rail marine engine in Japan. |
| 2008 |
ISO14001、ISO9001取得 |
| 2008 |
ISO 14001 and ISO9001 certifications obtained. |
| 2013 |
いすゞ自動車エンジン販売（株）設立（いすゞグループ内 産業エンジン販売事業を統合） |
| 2013 |
All models certified compliant with IMO Tier II emissions regulation. |
| 2014 |
コマツディーゼル（株）より、マリン事業譲渡を受ける |
| 2014 |
Company name changed from Isuzu Marine Engine Inc. to Isuzu Motors Engine Sales Inc. |
| 2017-12 |
Certification acquired
Former Isuzu Marine Engines Inc.
Head Office, Industrial Engine Eastern Japan Office, Nagoya Branch Office of Industrial Engine Eastern Japan Office, Engine Center, Industrial Engine Chiba Office, Industrial Engine Western Japan Office |
| 2018-12 |
Certification acquired
Head Office, Industrial Engine Eastern Japan Office, Nagoya Branch Office of Industrial Engine Eastern Japan Office, Engine Center, Industrial Engine Chiba Office, Industrial Engine Western Japan Office
Hokkaido Office, Kanto/Eastern Japan Office, Chubu/Kinki Office, Chugoku/Shikoku Office, Kyushu/Okinawa Office |
| 2021 |
いすゞ・やまとエンジン（株）を吸収合併 |
| 2021 |
Merged with Isuzu Yamato Engines Inc. |
| 2022-04 |
Certification acquired
Kawaguchi Office, Honbasu Office, Kawaguchiedo Office
(Three offices of former Isuzu Yamato Engines Inc.) |
