Too many Kumano's, this should be a reference to Kumano city, Kumano river and Kumano mountain (this Kumano was named after the river, as she was launched as a light cruiser).

Someone know why the fourth Kumano?

3 of them might be the three main Kumano Shrines in the area, plus one for the city/river proper.

ohhh...is there a Kumano mountain anywhere in Japan?...seem to remember one called Kumano, but not even close to remember its location

Please don't disturb the sea turtles (or "honu" as the Hawaiians call some of them) when they are laying eggs.