Here is the full list of all 21 Yumori Forest achievements.
kill an enemy with a deflected arrow
collect a total of 100 buries
reunite with the forest cat
complete a round without getting hit
defeat 10 enemies
defeat 100 enemies
defeat 1000 enemies
defeat 5000 enemies
collect a total of 1000 buries
collect a total of 10000 buries
deafeat tetsu
defeat domokai
defeat ciar
survive with less than 20 hp
defeat 3 enemies with 1 attack
buy all potion upgrades
buy everything in the shop
finish normal mode
bow to the merchant
finish hard mode
finish normal mode without leveling up