anime : kizumonogatari
Hakkai can be translated into English as "Eight Seas" which in this case refers to the eight pools of water that are the main attraction at Oshino Hakkai.
#kizumonogatari
Utamonogatari - Series Theme Song Collection
Bakemonogatari, Истории Монстров, Ошино Шинобу, Арараги Коёми, 忍野 忍 , 阿良々木 暦