| Rai Zin Udon Ramen Yaki Food Shop Limited | Private company limited by shares | Live |
| GAWAKI UDON LIMITED | Private company limited by shares | Dissolved |
| TATEBAYASHI UDON (H.K.) CO., LIMITED | Private company limited by shares | Dissolved |
| Little Udon Limited | | Live |
| UDON LOGISTICS LIMITED | Private company limited by shares | Dissolved |
| PURE UDON LIMITED | Private company limited by shares | Live |
| SANUKI UDON COMPANY LIMITED | | Live |
| SHIKOKU UDON COMPANY LIMITED | Private company limited by shares | Dissolved |
| Thai Udon Taste Limited | | Live |
| UDON WORKS LIMITED | Private company limited by shares | Live |