| Otonashi Kyouko | Shimamoto Sumi |
| Goudai Yuusaku | Futamata Issei |
| Ichinose Hanae | Aoki Kazuyo |
| Yotsuya | Chiba Shigeru |
| Roppongi Akemi | Mita Yuuko |
| Mitaka Shun | Kamiya Akira |
| Goudai Yukari | Kyouda Hisako |
| Nanao Kozue | Tominaga Miina |
| Yagami Ibuki | Fuchizaki Yuriko |
| Kujou Asuna | Tsuru Hiromi |
| Sakamoto | Furukawa Toshio |
| Ichinose Kentarou | Sakamoto Chika |
| Master (Cha-Cha-Maru no Master) [seiyuu known as Wakamoto Norio for last few episodes] | Wakamoto Noriaki |
| Souichirou-san (the dog) | Chiba Shigeru |
| Mitaka Shun's Father (uncredited) | Kamiya Akira |
| Nanao Yousuke (Kozue's Brother) | Hayashibara Megumi |
| Atsuko (Yagami's Friend) | Hayashibara Megumi |
| <UNNAMED ROLE> (ep.1) | Hayashibara Megumi |
| <UNNAMED ROLE> (ep.1) | Tachiki Fumihiko |
| <BOOKSHOPKEEPER -credited as 'Master' but not normal chara>(ep.3) | Wakamoto Noriaki |
| <UNNAMED ROLE> (ep.3) | Matsui Naoko |
| <UNNAMED ROLE> (ep.4) | Hayashibara Megumi |
| <UNNAMED ROLE> (ep.4) | Shimada Bin |
| Grandmother (ep.5) | Kyouda Hisako |
| Female College Student (ep.5) | Hayashibara Megumi |
| Soba cook (ep.5) | Tachiki Fumihiko |
| <UNNAMED ROLE> (ep.6) | Tanaka Kazumi |
| Otonashi Souichirou (ep.7,++) | Tanaka Hideyuki |
| <UNNAMED ROLE> (ep.7) | Hayashibara Megumi |
| <UNNAMED ROLE> (small child running past) (ep.8) | Hayashibara Megumi |
| Planetarium Narrator (ep.39) (uncredited) | Wakamoto Noriaki |
| Opening Narrator (ep.40) (uncredited) | Wakamoto Noriaki |
| Nursery Child (ep.XX) | Araki Kae |
| Saotome | Ootake Hiroshi |
| Pet-Shop Shop Assistant -Anime Debut Role | Ootani Ikue |
