Series premieres in April

The official Twitter account for the television anime of Amyū's Kono Oto Tomare! ( Stop This Sound!)  manga revealed two more cast members for the anime on Monday.  Yoshimasa Hosoya will play Tetsuki Takaoka, Chika's childhood friend and a student at Tokise High School.  Shouta Aoi will play Mio Kanzaki, a member of Hakuto High School's koto club.  The Twitter account added it will reveal more information about the anime on December 4. 

Previously announced cast members include:

Yūma Uchida as Chika Kudō



Junya Enoki as Takezō Kurata



Atsumi Tanezaki as Satowa Hōzuki



The anime will premiere in April 2019.  All of the announced cast members except Uchida will appear at the Jump Super Stage "Kono Oto Tomare!"  event at Jump Festa 2019 at Chiba's Makuhari Messe venue on December 23. 

Ryōma Mizuno is serving as the series director at Platinum Vision (Saiyuki Reload Blast, Servamp, Devils' Line).  Ayumu Hisao (Devils' Line, Sword Oratoria: Is It Wrong to Try to Pick Up Girls in a Dungeon?  On the Side) is both writing and overseeing the scripts, Junko Yamanaka (ReLIFE, Servamp) is the character designer, and Toshimitsu Kobayashi (Spice and Wolf II, Aoharu x Machinegun) is the sub-character designer.  Yamanaka and Kobayashi are also both serving as chief animation directors, and Hideaki Oba is the adviser. 

In the story, Takezō is the last remaining member of the koto club, a club dedicated to the traditional Japanese string instrument.  If he doesn't find new members, the koto club will be terminated.  One day, Takezō is alone in the club room when a student barges in and demands to join.  The student is delinquent Chika Kudō, a boy who even scares delinquent upperclassmen at other schools. 

Amyū launched the manga in Jump SQ.  in August 2012, and the 18th compiled volume shipped on August 3.  The 19th volume will ship on December 4.  The manga has more than 2.5 million copes in print. 

Sources: Kono Oto Tomare!  anime's Twitter account, Comic Natalie