| Company | Timeline | Status | |
| Brilliant Dyes Ltd Director • Professor | 18 Mar 2025←8 Months→Current | Active | |
| Tsutsuji Limited Director • Professor Of Chemical Engineering | 17 May 2016←6 Years→31 May 2022 | Dissolved | |
| Applied Patents International Ltd Director • Reader | 23 Aug 2004←21 Years→Current | Active | |
| Advanced Polymer Technologies International Ltd Secretary • Unreported | 26 Jul 2004←18 Years→26 Jul 2022 | Dissolved | |
