もったいない

• Reading: もったいない
• Romaji: mottainai
• Pronunciation: /mot.ta.i.na.i/

Meaning

What a waste! Too good to throw away — expresses regret over wasted resources, opportunities, or potential.

もったいない encompasses a deep-rooted Japanese sensibility against waste of any kind — food, time, talent, objects. It gained global recognition when Kenyan Nobel laureate Wangari Maathai adopted it as an environmental slogan. In daily life, it is used for everything from leftover food to an underused talent, carrying both practical and philosophical weight.

Examples

1. まだ食べられるのに捨てるの？もったいないよ。 You're throwing it out even though it's still edible? What a waste!
2. あんなに才能あるのに使わないなんてもったいない。 Having all that talent and not using it — what a waste.
3. このドレス一回しか着てないのにもったいないなぁ。 I've only worn this dress once and it's just sitting there — such a waste.

Usage Guide

Context: daily life, food, environmental discussions, compliments on unused talent

Tone: regretful, caring, practical

Do Say

• もったいないから残さず食べよう (Let's not waste it — eat everything)
• 英語ペラペラなのに使わないなんてもったいない (You're fluent in English but don't use it — what a waste)

Don't Say

• 人にプレゼントされたものに「もったいない」と断るのは状況による (Refusing a gift saying もったいない can be humble or can seem like you're rejecting it — context matters)

Common Mistakes

• Translating もったいない as simply 'wasteful' — it carries deeper cultural weight about respecting the inherent value of things
• Not realising it can be used as a compliment: もったいない can mean 'too good for' or 'more than I deserve'

Origin & History

From Buddhist concept 勿体 (mottai, the intrinsic dignity of a thing) + ない (lacking) — to lack proper reverence for an object's worth. Gained international recognition in 2005 when Nobel laureate Wangari Maathai promoted it as an environmental keyword.

Cultural Context

Era: Buddhist origins, deeply embedded in Japanese daily culture

Generation: All ages

Social background: Universal

Regional notes: Used across all of Japan. Internationally recognised as a uniquely Japanese environmental concept since Wangari Maathai's 2005 campaign.