Rhythm Heaven Groove

Tsunku ♂

Musician, producer, and the creative force behind every Rhythm Heaven game.

Who Is Tsunku?

Tsunku ♂ (born Mitsuo Terada, October 29, 1968) is a Japanese singer, songwriter, and producer, and the former lead of the rock band Sharam Q. He is best known as the primary producer for Morning Musume and other Hello! Project idol acts — work whose singles exceed 37.9 million copies sold, ranking him among the best-selling lyricists in Japan.

Rhythm Heaven began as his idea. In 2004 he pitched Nintendo a rhythm game "that did not rely on visual indicators," and the resulting Rhythm Tengoku (2006) was built with him as composer and supervisor. He has served as the series' producer and composer ever since, co-writing the music with Nintendo composer Masami Yone. His funk, disco, and J-pop sensibility — citing influences like Chic, Kool & the Gang, and Earth, Wind & Fire — gives the series its distinctive sound.

Returning for Rhythm Heaven Groove

Tsunku is confirmed to return as composer for Rhythm Heaven Groove (Switch, 2026), the series' first new game in over a decade. He worked on the game without his vocal chords while recovering from laryngeal cancer; longtime artist Ko Takeuchi also returns as lead art designer.

Career & Series Milestones

  1. 2004

    Pitches the concept

    Tsunku proposes a rhythm game "that did not rely on visual indicators" to Nintendo.

  2. 2006

    Rhythm Tengoku

    The GBA original ships, built from his idea as composer and supervisor.

  3. 2008–2015

    Series producer & composer

    Produces and scores Rhythm Heaven (DS), Fever (Wii), and Megamix (3DS).

  4. 2014–2015

    Laryngeal cancer

    Diagnosed in March 2014; vocal cords removed April 2015. Stays on as series composer.

  5. 2026

    Returns for Groove

    Contributes music to the Switch entry — without his vocal chords, while recovering.

Tsunku FAQ

Who is Tsunku?
Tsunku ♂ (born Mitsuo Terada, October 29, 1968) is a Japanese singer, songwriter, and producer, former lead of the rock band Sharam Q, and the primary producer behind Morning Musume and other Hello! Project acts. He created and has produced the Rhythm Heaven series since its inception.
Is Tsunku working on Rhythm Heaven Groove?
Yes. Tsunku is confirmed to return as composer for Rhythm Heaven Groove, the Switch entry. He worked on the game without his vocal chords while recovering from laryngeal cancer. Artist Ko Takeuchi also returns as lead art designer.
What is Tsunku known for outside Rhythm Heaven?
He is the primary producer for Morning Musume and other Hello! Project idol acts; his singles exceed 37.9 million copies sold, making him one of the best-selling lyricists in Japan.