酸 JLPT N1 Kanji 酸 — acid, bitterness, sour, tart JLPT N1 14 strokes Grade 5 Radical 酉 #1218 most frequent Nature · Substance Readings On'yomiサン Kun'yomiす.い Example words 酸化さんかoxidation 酸性さんせい(1) acidity (2) acidic 酸素さんそoxygen 酸さん(1) acid (2) sourness; sour taste 酸っぱいすっぱいsour; acid