CHARACTER PROFILE
Koichi's Father
- Primary work
- Diamond is Unbreakable
The husband of Koichi's mother, and the father of Koichi and Ayana Hirose. He is only seen in a photograph. Tamami Kobayashi threatens to use The Lock on him if Koichi doesn't give him money.

Image attribution details
Koichi's Father. Source illustration via JoJoWiki; copyright remains with the original rights holders.
Image via JoJoWiki. Original franchise/production rights holders retain copyright; the wiki text CC BY-SA license does not license this image.
Original image ↗ · Archived image ↗01Basic information
02Sources & attribution
- Unnamed Characters in Diamond is Unbreakable
Source text: JoJoWiki and its contributors. This entry has been reorganized and condensed for readability under CC BY-SA 4.0. Archived records reflect their capture dates. Referenced manga, anime, and artwork retain their respective copyrights.
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