2890. This #kanjipuzzle is about evolution. Start with one character, add a few strokes, and get another, then repeat. 一 -> ? -> ? -> ? -> ? -> ? -> ? -> 薬

一 -> 二 -> コ -> 口 -> 日 -> 早 -> 楽 -> 薬

一 ICHI, ITSU, hito(tsu) - one

二 NI, futa(tsu), futa - two

コ Katakana "Ko"

口 KOU, kuchi - mouth

日 NICHI, JITSU, hi, ka - sun, day

早 SOU, SA, haya(i) , haya(meru) - early, fast, hasten

楽 RAKU, GAKU, tano(shii), tano(shimu) - music, fun, pleasure

薬 YAKU, kusuri - medicine, healing