| Company | Timeline | Status | |
| Michiko Sushi Koshino Limited Director • Designer | 25 Feb 2016←5 Years→30 Nov 2021 | Dissolved | |
| Hallelujah Limited Director • Director | 16 Apr 2009←16 Years→Current | Active | |
| Queens Park Properties Limited Director • Unreported | 26 Feb 2004←21 Years→Current | Active | |
| Kabushiki Kaisha Michiko Koshino Japan Director • Fashion Designer | 12 Jan 1998←25 Years→2 Oct 2023 | Converted/Closed | |
