| Company | Timeline | Status | |
| Topcon Limited Director • Unreported | 16 Jan 2026←10 Days→Current | Active | |
| Topcon Building Limited Director • Unreported | 28 Dec 2020←5 Years→Current | Active | |
| Topcon Building (Holdings) Limited Director • Unreported | 16 Nov 2020←5 Years→Current | Active | |
