| U | u-ki | U/S |
| U | U-KO | U&K |
| U | U-ma | u=ar=oK |
| U | U-MA | U1 |
| U | U-MAZLA | U1 High-Speed |
| U | u-mi う〜み | U1 Jewel Style |
| U-F SEQUENCER | U-Qi | U1 overground |
| U-GEN 幽玄 | U-re:x ユーリックス | U1 undefined behavior |
| U-go Karasuma 烏丸友吾 | U-ske | U1 unplugged |
| U-ICHI | U-ske Asada 浅田祐介 | U1-2MB[k] PROJECT |
| U-ichiro Hiraoka 平岡遊一郎 | U-ya Asaoka 浅岡雄也 | U1-ASAMi |
| U-ji | U-zhaan | U2 |
| U-ji a.k.a. RaychoruiP U-ji a.k.a. 霊長類P | U-zo Ohkusu 大楠雄蔵 | U2 Akiyama あきやまうに |
| U-ka | u:zo | U35 |
| U-ka saegusa 三枝夕夏 | U.G.M. | UAKTI |
| U-ka saegusa IN db 三枝夕夏 IN db | U.M.A. | Ubaldo B |
| U-Ken! ウケン! | U.M.E.D.Y. | Ucca-Laugh |
| U-key | U.N. OWEN | ucchi うっちー |
| U-key | U.T.D & Friends | Ucchies ウッチーズ |
| U-Key zone | u.z. | ucchiy うっちぃ |
