“Ah, my dear reader, I’m glad that you’ve asked. The J stands for James, which is my middle name. My mum wanted me to have a good, strong Christian name, while my father desired a more traditional Japanese name. In the end, they compromised on my name as it is now… which has been very useful during my travels overseas when I wish to go by a more localized moniker. Most of my mates in London know me as James Hakuba, for example, not Saguru.”

…

((Note from the Mun: His middle name has helped him avoid a lot of teasing, too. I mean really can you just see British kids calling him variations of ‘Saggy Roo’? How horrible is that? Hakuba would be loathe to admit this, however. But, this is also why he prefers to be called ‘Hakuba’ above any other name, even with very close friends.

You can read more about this and other headcanon items by going here, as well: http://whiteknighthakuba.tumblr.com/headcanon 😀 ))