| April 1986 | Joined The Yokohama Rubber Co., Ltd. |
| June 2007 | General Manager, Head of PC Tire Designing Dept. No. 2 |
| June 2009 | General Manager, Head of Mishima Plant |
| January 2011 | General Manager, Head of Shinshiro Plant |
| October 2013 | General Manager, Head of Consumer Tire Product
Planning Dept. |
| March 2014 | Corporate Officer, Head of Consumer Tire Product Planning Dept., President of Yokohama Motorsports International Co., Ltd. |
| October 2014 | Corporate Officer, Head of Consumer Tire Development Div., President of Yokohama Motorsports International Co., Ltd. |
| April 2015 | Corporate Officer, Head of Consumer Tire Development
Div., Head of Tire Research & Experiment Dept. |
| March 2016 | Corporate Officer, Head of Consumer Tire Development
Div., Head of Tire R&D Dept. |
| March 2017 | Member of the Board and Managing Officer, Chief Tire Technical Officer, Head of Consumer Tire Development Div., in charge of R&D Center |
| March 2018 | Member of the Board and Managing Officer, Chief Tire Technical Officer, Head of Consumer Tire Development Div., in charge of R&D Center, in charge of Multiple Business Production and Technology |
| March 2019 | Member of the Board and Managing Officer, Chief Technical Officer, Head of Research and Advanced Development Div., in charge of Multiple Business Production and Technology |
| March 2021 | Member of the Board and Managing Officer, Chief Technical Officer, Head of Research and Advanced Development Div., in charge of Multiple Business Production and Technology, in charge of Corporate Quality Assurance Div. |
| March 2022 | Full-Time Advisor, in charge of Multiple Business Production and Technology |
| April 2024 | Part-Time Advisor (resigned in March 2026) |
| Jun. 2026 | Outside director (current position) |