2075. This puzzle is about evolution. Start with 1 character, add some strokes to get another, & repeat. 一 -> ? -> ? -> ? -> ? -> ? -> ? -> ? -> ? -> ? -> 墨


一 -> 二 -> コ -> 口 -> 日 -> 旧 -> 田 -> 甲 -> 里 -> 黒 -> 墨  

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

旧  KYUU, KU - old, former

田  DEN, ta - paddy field

甲  KOU, KAN - first in a series, high voice

里  RI, sato - village

黒  KOKU, kuro(i) - black

墨  BOKU, sumi - ink