Riku Utsunomiya a affronté 55 adversaires tout au long de sa carrière.

Player Team(s) Games
Keve Aluma 1
Pat Andree 2
Hayate Arakawa 1
Mie Birishibe 2
Mark Burton 2
Kemark Carino 2
Kofi Cockburn 1
Josh Crawford 2
Renaldo Dixon 2
Zen Endo 1
Nick Fazekas 1
Yuma Fu 1
Kouki Fujioka 2
Steven Green 1
Takumi Hasegawa 1
Ryoma Hashimoto 1
Jordan Heath 1
Yuichi Ikeda 1
Yamato Ito 2
Lakeem Jackson 2
Matt Janning 1
Yuya Kamata 1
Kiichi Kikuyama 2
Keigo Kimura 1
Hayate Komasawa 2
Naoya Kumagae 1
Tsubasa Kurihara 2
Shawn Long 1
Sator Maita 1
Kaisuke Masuda 1
Takumi Masuko 2
Yuta Matsushita 1
Keijiro Monma 2
Olu Mosaku 1
Brock Motum 1
Alex Murphy 1
Tsukasa Nakano 1
Dan Nnanna 1
Yuto Nohmi 1
Marc-Eddy Norelia 2
Junki Nozato 2
Kazuma Okajima 2
Ryota Sakurai 1
Takuya Sasaki 2
Reon Shibuta 1
Ren Shimatani 1
Daichi Shimoyama 2
Ryusei Shinoiama 1
Tensho Sugimoto 1
Shinya Takagi 2
Shuto Terazono 1
Daichi Tomioka 1
Hiroki Usui 2
Yuto Yamanouchi 2
Michael Young 1