He appears to be at Darmstadt, where he is listed as an '87. http://www.geomix.at/verein/1-fca-darmstadt/team/1-mannschaft/spieler/yukihiro-robert-kaneda-92561 He may be from California.
TrasnferMArkt lists him as an american FWIW. http://www.transfermarkt.co.uk/en/kaneda/profil/spieler_234340.html
That's what it says on his profile page on the club site, which is what's linked in the first post. I assume that's Transfermarkt's source as well, but I can't say for sure.
Appears to now be with Eintracht Bad Kreuznach. Scored three in a recent match: 3x Kaneda http://www.eintracht1902.de/news/ That actually seems to have been a league match. They won 15-1.