Oshi-katsu Explained: How Supporting Your Fave Became a Japanese Lifestyle

Ask a Japanese friend what they did last weekend and you might hear: 推し活してた (oshi-katsu shiteta) — “I was doing oshi-katsu.” No further explanation needed. In Japan today, everyone knows what that means.

Oshi + katsu

The word has two parts:

• 推し (oshi) — your favorite person or character. It comes from the verb 推す (osu), “to recommend, to support.” Your oshi is the one you’d push forward and recommend to everyone.
• 活 (katsu) — short for 活動 (katsudō), “activity.” Japanese loves this kind of shortening: 就活 (shūkatsu, job hunting), 婚活 (konkatsu, partner hunting), 朝活 (asakatsu, morning routine).

So 推し活 is “fave activities”: everything you do to support the person or character you love.

From idol fandom to everyone

The word 推し grew up in Japanese idol culture, where big groups have many members and fans each pick their favorite. Around 2020 it broke out of fandom and into everyday life. In 2021, 推し活 was a nominee for Japan’s New Words and Buzzwords Awards — the same awards we wrote about in our word of the year story.

Today an oshi can be almost anything: a K-pop star, an anime character, a baseball player, a VTuber, a figure skater, even a train line or a local mascot. Companies noticed too — Japanese marketers now talk about 推し消費 (oshi shōhi), “oshi spending.”

What do people actually do?

• ライブ・イベント — go to concerts and events, sometimes many in one tour
• グッズ (guzzu) — collect merch: acrylic stands (アクスタ, akusuta), badges (缶バッジ, kan-bajji), photo cards
• 遠征 (ensei) — literally “expedition”: traveling to other cities for shows
• 聖地巡礼 (seichi junrei) — “pilgrimage”: visiting places that appear in an anime or music video
• コラボカフェ — themed cafés with special menus for a series or group
• 誕生日のお祝い — celebrating your oshi’s birthday, sometimes with a cake and their photo, even if they’ll never know

Oshi-katsu isn’t just being a fan. It’s building part of your life around the joy someone else gives you.

The fan vocabulary starter pack

• 推し — your fave
• 箱推し (hako-oshi) — supporting the whole group, not one member (箱 = box)
• 担当 (tantō) — another word for your fave member, common in some fandoms
• 同担 (dōtan) — someone who has the same fave as you
• 沼 (numa) — “swamp”: a fandom you can’t escape. 沼にハマった = “I fell into the swamp.”
• 尊い (tōtoi) — precious, too pure (see our 滅 slang story)

The grammar hiding inside

推し comes from the ます-stem of the verb 推す: 推します → 推し. Many Japanese nouns are made this way:

• 休む (rest) → 休み (a break, a holiday)
• 話す (talk) → 話 (a story)
• 始める (begin) → 始め (the beginning)

Learn this pattern and you’ll start recognizing hundreds of nouns you’ve never studied.

So… who’s your oshi?

That’s actually a great conversation starter in Japan. 推しは誰？ (Oshi wa dare?) is friendly and casual. Ask it at a party and you might be listening for the next hour.