mottainai
もったいない、勿体無い
affluenza
anti-consumerism
Bal tashchit
Conspicuous consumption
freeganism
Frugality
Mottainai Grandma
"Mottai Night Land", a Kyary Pamyu Pamyu song which has Mottai nai in the title
muda, mura and muri, three types of waste in lean manufacturing
planned obsolescence
Simple living
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jisho mottainai