Japanese Americans tend to be fairly Republican.
Really? I thought Japanese were among the most Democratic Asian-American voters, having neither the Chinese and Vietnamese anti-Communist thing nor Filipino- or Korean-style Christian conservatism.
Not since the 1990s at least. They were probably GOP till Clinton, assuming the Japanese-American internment during the FDR era had some impact.
Japanese Americans are one of the least religious Asian groups and Asians overall are very non religious. That would explain their voting patterns. It would be interesting to find out how they voted before the 90's.