Things I'd never thought I'd learn in Japan:
Apparently gutting a fish (serves me right for not looking properly and assuming) means that I have to scrape the innards out with my hands. eeeeew. Eew.
That I'm a little squeamish when it comes to innards....actually, I don't know why that one's a surprise in Japan, given some of the things I've had put in front of me and been expected to eat. Case in point: boiled fish ovaries. eew.