Kogin Wainui (Kasar Arewa)

Kogin Wainui kogi ne dake Arewa na Tsibirin Arewa wanda ke yankin New Zealand . Yana gudana gabaɗaya arewa maso gabas daga tushensa a ƙarshen Maungataniwha Range don isa kogin Oruaiti mai nisan kilomita biyar kudu maso yammacin tashar Whangaroa .