# Japanese musical artists performing anime themes

> Live situation record from CLSTR: https://clstr.news/situations/japanese-musical-artists-performing-anime-themes
> Updated: 2026-10-02T03:55:41.000Z. Sources: 3. Developments: 2.

Japanese musical artists have been announced as performers for upcoming anime theme songs. Artist iri will perform the opening theme ‘Period’ for the TV anime ‘Hotaru no Yomeiri’, which is scheduled to broadcast on Fuji TV’s ‘Noitamina’ block starting October 9, 2026. 

Additionally, singer-songwriter Riria. has been selected to perform the opening theme ‘Shiawase de Namida ga Deru no wa.’ for special episodes of the TV anime ‘My Happy Marriage’. This marks her third contribution to the series. The track is scheduled for a TikTok pre-release on October 2, with a full release via a commemorative EP on October 21.

## Timeline

### 2026-10-02: Riria. to perform opening theme for ‘My Happy Marriage’ anime special

Singer-songwriter Riria. will perform the opening theme for the ‘My Happy Marriage’ anime special. She also announced upcoming concerts in Taipei and Tokyo.

2 sources. https://clstr.news/cluster/riria-to-perform-opening-theme-for-my-happy-marriage-anime-special

### 2026-09-18: iri to perform opening theme for anime Hotaru no Yomeiri

Artist iri will perform the opening theme ‘Period’ for the upcoming TV anime ‘Hotaru no Yomeiri’, set to premiere on Fuji TV in October 2026.

2 sources. https://clstr.news/cluster/iri-to-perform-opening-theme-for-anime-hotaru-no-yomeiri

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Cite as: Japanese musical artists performing anime themes. CLSTR, https://clstr.news/situations/japanese-musical-artists-performing-anime-themes