I only know two white (haole) people who fit that description, somewhat. They are both fascinated by Japan, and speak Japanese, but I wouldn t exactly call them obsessed with everything about the culture.
umm i ve been to hawaii MANY times in my life (i used to live in/am from American Samoa-another South Pacific island) and i am most definitely sure that there are going to be alot of people that like stuff like that. I dont live on the islands anymore, but even where i am now there are so many people who are interested/in love with anime, japan, etc. Considering the effect japan gave hawaii its pretty possible that theres a lot of people like that. And if youre actually like going there-just kno that the asians and the other pacific islanders r prolly interested in stuff like too ;)
I have a Filipino friend who is very taken with Japanese art, design, etc. But I personally don t know of any ha oles who are obsessed with things Japanese.