Mottainai

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Mottainai (もったいない) is a Japanese cultural concept and expression meaning "What a waste!" or "Don't waste!" it reflects deep regret for squandering valuable resources, talent, or opportunities, rooted in Buddhist respect for nature, encouraging mindful consumption, reuse, and valuing things beyond their immediate use, like repairing pottery with gold (Kintsugi) or transforming old kimonos.

Via: In Japan wasting pencils is disrespectful, so pencil extenders are used to follow the mottainai spirit and use every bit. https://x.com/sciencegirl/status/2011465522743783449