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Unhappy Birthday Kobun

2025 single by Sakurazaka46
VisualArtwork single Q135951728
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Summary

Unhappy Birthday Kobun is a single[1]. It ranks in the top 3% of single entities by monthly Wikipedia readership (956 views/month).[2]

Key Facts

  • Unhappy Birthday Kobun's instance of is recorded as single[3].
  • Unhappy Birthday Kobun's genre is J-pop[4].
  • Unhappy Birthday Kobun followed Make or Break[5].
  • Unhappy Birthday Kobun was followed by The growing up train[6].
  • Among the performers on Unhappy Birthday Kobun was Sakurazaka46[7].
  • Unhappy Birthday Kobun's record label is recorded as Sony Music[8].
  • Unhappy Birthday Kobun's Commons category is recorded as Unhappy Birthday Kobun[9].
  • Unhappy Birthday Kobun's language of work or name is recorded as Japanese[10].
  • Unhappy Birthday Kobun was distributed by compact disc[11].
  • Unhappy Birthday Kobun was published on October 29, 2025[12].
  • Unhappy Birthday Kobun's official website is recorded as https://sakurazaka46.com/s/s46/page/13th_single[13].
  • Unhappy Birthday Kobun's title is recorded as Unhappy birthday構文[14].
  • Unhappy Birthday Kobun's hashtag is recorded as 櫻坂46_UnhappyBD構文[15].
  • Unhappy Birthday Kobun's announcement date is recorded as August 24, 2025[16].

Product Details

The following facts are restated verbatim from public-domain and CC0 open-data sources — every line is independently verifiable against the named source's catalog.

MusicBrainz — CC0 open music encyclopedia

  • Release type: Single[17]

  • First release date: 2025-10-29[18]

  • MusicBrainz ID: 53e8ede2-bb61-464a-bd0d-6f5be1abf5df[19]

Body

Authorship and Creation

Unhappy Birthday Kobun was performed by Sakurazaka46[7].

Publication

Unhappy Birthday Kobun was released on October 29, 2025[12]. Its language of work or name is recorded as Japanese[10]. Its genre is J-pop[4]. It was distributed by compact disc[11].

Adaptations and Inspiration

Unhappy Birthday Kobun followed Make or Break[5]. It was followed by The growing up train[6].

Why It Matters

Unhappy Birthday Kobun ranks in the top 3% of single entities by monthly Wikipedia readership (956 views/month).[2] It is known by 9 alternative names across languages and contexts.[20]

Related Entities

Sony Music

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.

Product details (FDA / USDA / NHTSA public-domain catalog data)

  1. [17] ↑ . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.
  2. [18] ↑ . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.
  3. [19] ↑ . MusicBrainz (MetaBrainz Foundation). musicbrainz.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [20] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Unhappy Birthday Kobun. Retrieved October 20, 2026, from https://4ort.xyz/entity/unhappy-birthday-kobun
MLA “Unhappy Birthday Kobun.” 4ort.xyz Knowledge Graph, 4ort.xyz, 20 Oct. 2026, https://4ort.xyz/entity/unhappy-birthday-kobun.
BibTeX @misc{4ortxyz_unhappy-birthday-kobun_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Unhappy Birthday Kobun}}, year = {2026}, url = {https://4ort.xyz/entity/unhappy-birthday-kobun}, note = {Accessed: 2026-10-20}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Unhappy Birthday Kobun — https://4ort.xyz/entity/unhappy-birthday-kobun (retrieved 2026-10-20)

Canonical URL: https://4ort.xyz/entity/unhappy-birthday-kobun · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 4w ago · Wadaihangit · 2026-09-20 view diff on Wikidata ↗
    Language of work or name → Japanese
    Publication date → —
    Genre → J-pop
    Record label → Sony Music
    + 14 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:2||1 */ Official website: https://sakurazaka46.com/s/s46/page/13th_single"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.