河内[hanoi] Hanoi
運河[unga] canal
応急渡河[oukyuutoka] hasty crossing
黄河[kouga] Yellow river (in China)
河港[kakou] river port

河鹿[kajika] kajika frog (Buergeria buergeri)
河床[kashou] riverbed
河水[kasui] river water
河川[kasen] rivers
河童[kappa] kappa (mythical water-dwelling creatures)

脂鰉[aburahigai] Sarcocheilichthys biwaensis (species of cyprinid)
河鰉[kawahigai] Sarcocheilichthys variegatus variegatus (subspecies of cyprinid)

琵琶鰉[biwahigai] Biwa oily gudgeon (Sarcocheilichthys variegatus microoculus)