Full cast of The Piano Forest

Junichi Suwabe

Sosuke Ajino (voice)

21 episodes

Soma Saito

Kai Ichinose (voice)

19 episodes

Hideyuki Tanaka

Yoichiro Amamiya (voice)

19 episodes

Natsuki Hanae

Shuhei Amamiya (voice)

18 episodes

Natsuki Mori

Christina Bayer (voice) / (voice) / Nonomura (voice) / Homeroom Teacher (voice)

17 episodes

Koji Yusa

Takeshi Saga (voice)

16 episodes

Anna Mugiho

Anna Bilińska (voice) / Shiraishi (voice) / (voice) / Tenmaru (voice)

16 episodes

Kenta Zaima

Igor Gutmann (voice) / (voice) / Takako's Father (voice) / Kamata (voice) / Announcement (voice)

15 episodes

Marie Miyake

Namie Amamiya (voice) / (voice)

13 episodes

Bin Shimada

Jean Jacques Serrault (voice)

12 episodes

Yuichi Nakamura

Wei Pang (voice)

11 episodes

Hironori Kondoh

Jan Turczyński (voice) / Hao Pang (voice) / Daniel Hunt (voice) / (voice)

11 episodes

Rika Kinugawa

(voice) / Takako's Sister (voice) / Landlady (voice) / Engelhard (voice)

11 episodes

Kajetan Rodziewicz

Master of Ceremonies (voice)

11 episodes

Ryoko Shiraishi

Kai Ichinose as an Elementary School Boy (voice)

10 episodes

Eiichiro Tokumoto

Andrzej Pavlas (voice)

10 episodes

Tomohisa Aso

Piotr Weber (voice)

10 episodes

Maaya Sakamoto

Reiko Ichinose (voice)

9 episodes

You Taichi

Shuhei Amamiya as an Elementary School Boy (voice) / (voice)

9 episodes

Hiroyuki Endo

David Smith (voice) / (voice) / Shibuya (voice)

9 episodes

KENN

Lech Szymanowski (voice)

8 episodes

Katsuyuki Konishi

Karol Adamski (voice)

8 episodes

Aoi Yuuki

Takako Maruyama (voice)

8 episodes

Kanehira Yamamoto

Adam Jasiński (voice)

8 episodes

Hitoshi Bifu

Józef Stroik (voice) / Marek Buzek (voice)

7 episodes

Takahiro Sumi

Jacek Hoffman (voice) / Antoni Kord (voice) / (voice)

7 episodes

Toshiyuki Toyonaga

Kosei Hirata (voice)

6 episodes

Ryunosuke Watanuki

Waldemar Ekiert (voice) / (voice)

6 episodes

Yuina Yamada

(voice) / Allegra Granados (voice)

6 episodes

Risa Hayamizu

Victoria Campbell (voice)

5 episodes

Nobuaki Kanemitsu

Tamakaji (voice) / Lech's Father (voice)

4 episodes

Motoko Kumai

Daigaku Kanehira (voice) / Mozart as a Daigaku Kanehira Lookalike (voice)

4 episodes

Kimiko Saito

Proprietress of Bar Akatsuki (voice)

4 episodes

Daisuke Hatooka

Min Liu (voice) / (voice) / Old Man Pon (voice)

4 episodes

Mariya Ise

Sophie Ormesson (voice)

3 episodes

Hiroshi Yanaka

Kotaro Shiba (voice)

3 episodes

Yuuki Wakai

Olesya Yushchenko (voice) / Wei Pang as a Boy (voice)

3 episodes

Keisuke Misaizu

Simon Hausner (voice)

3 episodes

Jun Miyamoto

Raphael (voice)

3 episodes

Kazuki Souya

Kon (voice)

3 episodes

Ryo Hirohashi

Arisa (voice)

3 episodes

Seiichiro Yamashita

Mozart as a Youth (voice) / Mozart (voice) / Sophie's Brother (voice)

3 episodes

Saki Yamakita

(voice) / Announcement (voice)

3 episodes

Mariko Higashiuchi

Aubrey Theiss (voice)

2 episodes

Wataru Urata

Chang-soo Ahn (voice)

2 episodes

Reiou Tsuchida

Chang-woo Ahn (voice)

2 episodes

Chiaki Kobayashi

Satoru Mukai (voice)

2 episodes

Yuki Ishikari

Alberto Rossi (voice)

2 episodes

Tomori Kusunoki

Emilia Szymanowski (voice)

2 episodes

Yuki Ono

Ben (voice)

2 episodes

Shunpei Fukuma

Obuchi (voice)

1 episode

Wataru Komada

Shinagawa (voice)

1 episode

Yu Wakabayashi

Takadaba (voice)

1 episode

Yumiko Kobayashi

Daiki (voice)

1 episode

Tomoko Tsuzuki

(voice)

1 episode

Rie Kawamura

(voice)

1 episode

Hisako Tojo

(voice)

1 episode

Sayaka Senbongi

(voice)

1 episode

Kaede Hondo

(voice)

1 episode

Daiki Hamano

(voice)

1 episode

Yuya Miyashita

(voice)

1 episode

Nana Inoue

(voice)

1 episode

Yukiko Aruga

(voice)

1 episode