1571. This #kanjipuzzle is about evolution. Start with one character, add a few strokes, and get another, then repeat. 一 -> ? -> ? -> ? -> 侍一 -> 十 -> 土 -> 寺 ->

Answer:

一  ICHI, ITSU, hito(tsu) - one

十  JUU, tou, to - ten

土  DO, tsuchi - earth, soil

寺  JI , tera - temple

侍  JI, samurai - samurai