# Unhappy Birthday Kobun
**Wikidata**: [Q135951728](https://www.wikidata.org/wiki/Q135951728)  
**Source**: https://4ort.xyz/entity/unhappy-birthday-kobun


## References

1. [Source](https://sakurazaka46.com/s/s46/news/detail/R00491)
2. MusicBrainz
3. [Source](https://sakurazaka46.com/s/s46/news/detail/R00493)