sui genkan'yō
1. headwater conservation; water source protection
Noun
#301992
1. headwater conservation; water source protection
1. tolerance; open-mindedness
1. source of river; fountainhead
1. extremely important; essential
1. idiom; set phrase
1. Important; Essential
1. Tolerant; Forgiving
1. Water source; Origin of water
1. Essential; Important
1. Essential; Vital