- Dr. Tamisuke Yokogawa established Yokogawa Bridge Works Ltd. in Osaka City.
- Established Yokogawa Construction Co.,Ltd.
- Established Yokogawa Techno-Information Service Inc.
- Established Yokogawa New Life Corp.
- Company name changed to Yokogawa Bridge Corp. from Yokogawa Bridge Works Ltd.
- Established YCE Corp.
- Established Yokogawa System Buildings Corp.
- Acquired the stocks of Narasaki Seisakusyo Co., Ltd. and incorporated into the group.
- Established Yokogawa Bridge Holdings Corp.
- Established Yokogawa Sumikin Bridge Corp. (Changed company name to Yokogawa NS Engineering Corp. In 2019.)
- Yokogawa Bridge Corp. merged Yokogawa Construction Co., Ltd
Dr. Tamisuke Yokogawa
Imperial Palace Main Gate
Iron Bridge (1964)
Rainbow Bridge (1993)
Hakucho Bridge (1998)
Hong kong (2009)