I'm part Japanese and one of my cousin's had a similar nickname. My experience in the UK is that some people can be really weird and vocal about 'ethnic' names (I'm sure not everyone is not like that, but I've experienced it a lot) and if you are OK with having to possibly make constant explanations go for it.
I really like Hiro or Yoshi (I know the Mario association, but it's a name that's been used in my family), but I'm not sure if be brave enough to use it here.