Why do fans in Japan spend so much time and money on 'oshikatsu' — supporting a favorite idol, character or member?
Oshikatsu means devoting effort to one's 'oshi' (favorite): buying goods, attending events, decorating rooms and bags with merch, coordinating colors, and celebrating the oshi's birthday — often with a community of other fans.
Oshikatsu blends heartfelt self-expression and identity with a strong sense of community and a felt duty to 'support back' someone who brings you joy — a hobby of belonging as much as fandom.
Why — five layers
Choosing and championing an oshi is a way to express who you are and what you love, and to structure free time around something meaningful and joyful.
Fandoms form warm communities with shared language, member colors and rituals; supporting the oshi and connecting with fellow fans reinforce each other, and there is a felt reciprocity of giving back for the happiness received.
Idol and character industries, from group formats to random 'gacha' goods and event tie-ins, are built to reward ongoing engagement; social media lets fans organize, share and amplify their oshikatsu.
International view
Passionate fandom exists everywhere — K-pop, sports, comic conventions. Oshikatsu shares much with these; what stands out in Japan is the polished vocabulary, merchandise ecosystem and mainstream visibility of the hobby.
But not always
Oshikatsu ranges from casual to intense; most fans set their own budgets and boundaries. It is not limited to idols (people 'oshi' athletes, VTubers, even train lines), and it is a chosen hobby, not a universal behavior.
What to do
To experience it, visit merch-heavy areas like Ikebukuro's Otome Road or Nakano Broadway, or an idol event. If a friend has an oshi, asking about them warmly is a great way to connect.
Sources
- testimony on contemporary oshikatsu / idol and VTuber fan culture