Are we talking about acutal canon couples here or just couples we ship? For example, Shirou x Rider does not really exist, those scenes in Ataraxia were pure fan-service. They're side materials, which means they don't even happen in the already illusioned world of the game's main storyline.
Ciel's mom is of unknown oriental origins, which means she could be Japanese. This means she's could be half French, half Japanese, does that still count?
Do supernatural girlfriend/boyfriend count? There are a ton of those.
Lastly, there are a ton of White male x Asian female pairings since almost all JRPG games that takes place in a European setting (which is most of them) have a token Japanese girl, who is always a romance option in games that have multiple romanceable targets.