| Company | Timeline | Status | |
| Esoteric Audio Research Limited Secretary • Company Director | 30 Oct 1998←27 Years→Current | Active | |
| Esoteric Audio Research Limited Director • Company Director | 30 Oct 1998←27 Years→Current | Active | |
| Yoshino Limited Director • Business Executive | 25 Oct 1994←31 Years→Current | Active | |
| Yoshino Limited Secretary • Business Executive | 25 Oct 1994←31 Years→Current | Active | |
