▁p urg atory ▁for ▁a ▁wrong ▁done ▁to ▁them ▁during ▁their ▁lifetime . ▁ ▁U b ume : ▁A ▁mother ▁g host ▁who ▁died ▁in ▁child b irth , ▁or ▁died ▁leaving ▁young ▁children ▁behind . ▁This ▁y ū rei ▁returns ▁to ▁care ▁for ▁her ▁children , ▁often ▁bringing ▁them ▁swe ets . ▁ ▁G ory ō : ▁Ven ge ful ▁g hosts ▁of ▁the ▁arist ocr atic ▁class , ▁especially ▁those ▁who ▁were ▁mart y red . ▁ ▁Fun ay ū rei : ▁The ▁g hosts ▁of ▁those ▁who ▁died ▁at ▁sea . ▁These ▁g hosts ▁are ▁sometimes ▁dep icted ▁as ▁scal y ▁fish - like ▁hum ano ids ▁and ▁some ▁may ▁even ▁have ▁a ▁form ▁similar ▁to ▁that ▁of ▁a ▁mer ma id ▁or ▁m erman . ▁ ▁Z ash iki - war ashi : ▁The ▁g hosts ▁of ▁children ; ▁often ▁m isch iev ous ▁rather ▁than ▁dangerous . ▁ ▁: ▁These ▁spirits ▁do ▁not ▁seek ▁to ▁ful fill ▁an ▁exact ▁purpose ▁and ▁wand ers ▁around ▁aim lessly . ▁In ▁ancient ▁times , ▁the ▁disease ▁of ▁the ▁Emperor ▁of ▁Japan ▁was ▁thought ▁to ▁arise ▁as ▁a ▁result ▁of ▁these ▁spirits ▁floating ▁in ▁the ▁air . ▁ ▁: ▁Similar ▁to ▁a ▁fu y ū rei ▁and ▁is ▁rare , ▁these ▁spirits ▁do ▁not ▁seek ▁to ▁ful fill ▁an ▁exact ▁purpose ▁and ▁are ▁instead ▁bound ▁to ▁a ▁specific ▁place ▁or ▁situation . ▁Fam ous ▁examples ▁of ▁this ▁include ▁the ▁famous ▁story ▁of ▁Ok iku ▁at ▁the ▁well ▁of ▁H ime ji ▁Castle