課金

• Reading: かきん
• Romaji: kakin
• Kanji breakdown: 課 (levy, impose) + 金 (money, gold) → imposing a charge; spending money on in-app purchases
• Pronunciation: /ka.kiɴ/

Meaning

Spending real money on in-app purchases, especially in mobile games and gacha games.

Originally a neutral business term meaning 'charging a fee,' 課金 has been completely taken over by gamers to mean spending real money on microtransactions. It carries a slightly self-deprecating nuance, as heavy spending on virtual items is seen as irrational but irresistible. The word is central to Japan's massive mobile gaming economy.

Examples

1. 今月もう1万円も課金しちゃったけど、推しキャラが出たからいいや。 I already dropped 10,000 yen this month, but I pulled my favorite character so it's fine.
2. 課金しないと全然ゲーム進まないの、運営のやり方がえぐい。 You can't progress at all without spending money — the devs are ruthless.
3. 友達に課金額バレたら絶対引かれるから内緒にしてる。 If my friends found out how much I've spent, they'd definitely judge me, so I keep it secret.

Usage Guide

Context: gaming, social media, friends

Tone: self-deprecating, confessional

Do Say

• 限定ガチャだったからつい課金しちゃった。 (It was a limited gacha so I accidentally spent money.)
• 課金は月5000円までって決めてる。 (I've decided to limit my spending to 5,000 yen a month.)

Don't Say

• 電気代の課金 — use 支払い or 請求 for utility bills (課金 is only for voluntary game spending in slang usage)

Common Mistakes

• Using 課金 for regular bills or payments — in slang it specifically means voluntary in-app game spending
• Confusing 課金する (to spend money in-game) with 課金される (to be charged a fee)

Origin & History

From 課 (levy/impose) + 金 (money). Originally a formal term for billing or charging fees. Adopted by the gaming community in the 2010s as smartphone gacha games exploded in popularity.

Cultural Context

Era: 2010s with the rise of smartphone gacha games

Generation: Primarily teens to 30s, gamers of all ages

Social background: Universal among gamers

Regional notes: Used nationwide. Central term in Japan's mobile gaming culture, which generates billions in revenue annually.