積む

• Reading: つむ
• Romaji: tsumu
• Kanji breakdown: 積 (pile up, accumulate) → to stack up purchases for fan event access
• Pronunciation: /t͡su.mu/

Meaning

To stack up purchases (usually CDs) to accumulate fan event tickets or perks.

積む literally means 'to stack/pile up,' and in fan culture it specifically refers to buying multiple copies of the same CD or item to get more handshake tickets, photo opportunities, or to increase chances in a lottery. Heavy spenders might 積む dozens of copies. The practice is both celebrated and self-deprecatingly lamented by fans. It's closely tied to the idol industry's business model.

Examples

1. 今回の特典会のために20枚積んだけど後悔してない。 I stacked 20 copies for this fan meet and I have zero regrets.
2. 積みすぎてCDの置き場所がマジでない。 I've stacked so many CDs that I literally have nowhere to put them.
3. みんなどれくらい積むの？私は5枚くらいにしとく。 How many copies is everyone stacking? I'm gonna keep it to about five.

Usage Guide

Context: idol fan communities, social media

Tone: self-deprecating, confessional

Do Say

• 今月積みすぎて金欠になった。 (I bought so many copies this month that I'm broke.)
• 何枚積めば当選するか読めないのがつらい。 (It's tough not knowing how many copies to buy to win the lottery.)

Don't Say

• 他人の積み量を馬鹿にしない (Don't make fun of how much someone spends — it's a personal choice)

Common Mistakes

• Confusing with the literal meaning of physically stacking objects
• Not understanding that 積む implies buying multiples of the SAME item, not different items

Origin & History

Metaphorical extension of 積む (to stack, pile up). Adopted by idol fans in the 2000s-2010s to describe the practice of buying stacked quantities of CDs for event tickets, reflecting the literal pile of discs that results.

Cultural Context

Era: 2000s-2010s idol fan culture

Generation: Teens to 30s, primarily idol fans

Social background: Universal among idol fans (spending amount varies)

Regional notes: Used across all of Japan. The practice of 積む is a distinctive feature of the Japanese idol economy and a frequent topic of self-deprecating humor among fans.