エコ

エコ is short for エコロジー (ecology). It functions as a prefix meaning "eco-friendly" and is extremely common in modern Japanese marketing and daily life.

COMMON COMPOUNDS:

• エコバッグ: reusable shopping bag (very common since Japan's plastic bag charge in 2020)
• エコカー: eco-friendly car (hybrid/electric)
• エコ活動(かつどう): eco activities, green initiatives
• エコ商品(しょうひん): eco-friendly products
• エコポイント: eco points (government incentive program)

GRAMMAR:
Can be used as a na-adjective modifier: エコな生活(せいかつ) (eco-friendly lifestyle), エコな選択(せんたく) (eco-friendly choice).

SIMILAR EXPRESSIONS:

• 環境(かんきょう)にやさしい: environmentally friendly (more formal)
• グリーン: green (as in green energy, green initiatives)
• サステナブル: sustainable