Which one do you prefer, and why?
If it makes any difference, the baby will be 75% white, 25% Japanese. Taking from his older brother, he'll probably look slightly Asian, but not much (think of a Russian, or maybe someone with Mongolian ascent). His older brother has fair greyish eyes, was born with redish hair (has darkened now).
What I'm trying to say is that DS2 probably won't look properly Japanese, but won't be a blonde Arian guy either, (so no point naming him Katsushiro or Otto). I want a name that fits a person with a mixed heritage (specially because I don't know how exactly he'll will look, and want a name that fits any face).