Um...there's an early twentieth-century Japanese composer named Koscak* Yamada. He's got a CD out on Naxos. Not the best...some of the music owes a lot to Mozart, and the rest to Skrjabin, but it's still worth a listen.
*I assume that this is a misspelling on Naxos' part, as this name is unpronouncable in Japanese. It would more likely be 'Kosaku', or something like that.
Wikipedia lists him as "Kosaku Yamada" and says:
"In many western reference books his name is given as Kósçak Yamada, a fanciful transliteration he apparently used in the West."
-CS