Takuma Ter:hima : Hiroshi Ochanomizu
Yūichi Nakamura : Umatarō Tenma
Yūki Inoue : A10-6

Ayane Sakura : Ran Ochanomizu
Kengo Kawanishi : Shunsaku Ban
Mikako Komatsu : Motoko Tsutsumi
Mitsuki Saiga : Dr. Lolo
Nobuo Tobita : Kensaku Ban (Maruhige)
Takahiro Sakurai : Moriya Tsutsumi
Yoshino Nanjō : Maria

Aimi Tanaka : Shizu Akiba (ep 7)
Aoi Koga :
Female university student A (ep 2)
Rika Motokaji (ep 7)
Student #3 (ep 4)
Ayaka Shimizu : Linda Ōishi
Hayato Fujii : Staff (ep 8)
Hayato Kimura : Visitor (ep 2)
Hironori Saitō : Rock Suzuki (ep 9)
Hironori Shiojiri :
Audience #1 (ep 7)
Client C (ep 8)
Yamada and his merry comrades #3 (eps 9-11)
Katsuhiro Tokuishi : Student #5 (ep 4)
Katsumi Fukuhara : Spectator B (ep 4)
Kousuke Kobay:hi :
Security guard (ep 2)
Student #6 (ep 4)
Mafumafu : Student #2 (ep 4)
Mamiko Noto : Tsukie Saruta
Miharu Sawada : Student (ep 1)
Mutsuki Iwanaka :
Spectator A (ep 4)
Yamada and his merry comrades #1 (eps 9-11)
Norihito H:e : Client D (ep 8)
Ryouta Suzuki :
Announcement (ep 7)
Electric voice (ep 2)
Voice C (ep 8)
Sachiko Kojima : Housekeeper
Saori Takamiya : Announcer's voice (ep 5)
Satoshi Hino : Reckless Takeshi
Satoshi Murakami :
Audience #2 (ep 7)
Client B (ep 8)
Yamada and his merry comrades #4 (eps 9-11)
Shinya Takah:hi : Voice B (ep 8)
Shōta Yamamoto :
Ganji Agoiwa
Lab 4 research student (ep 2)
Robot A (ep 1)
Student #4 (ep 4)
Shun Horie :
AI (ep 4)
Lab 6 research student (ep 2)
Robot B (ep 1)
Voice A (ep 8)
Soraru : Student #1 (ep 4)
Takahiro Sakurai : Mars
Takako Tanaka :
Female university student (ep 6)
Girl A (ep 8)
Takuya Makimura : Professor C (ep 2)
Takuya Satō : Saruka Nig:sen (eps 9-11)
T:uku Kida :
Audience #3 (ep 7)
Client A (ep 8)
Postal robot (ep 6)
Yamada and his merry comrades #2 (eps 9-11)
Tomoko Natsukawa : Female university student B (ep 2)
Toshihiko Seki : Client (ep 3)
Y:umichi Kushida : Oyamada
Yoshihisa Kawahara : Sakakibara
Yoshiyuki Matsuura : Balloon Robo (ep 1)
Yuka Maruyama : A10-1 (Haru)
Yumi Hino : Girl B (ep 8)
Yuu Ay:e : Megumi Takanodai (ep 7)