I had no idea that there is a feature called Research Wiki on FamilySearch.org. It looks like there is some good starter information there, and I am excited to read up a bit more and see what I can find there. Here's a link to the article on getting started with Japanese research:
There is also a research forum for Asian family history research where you can ask questions and see if anyone can help with your questions:
And, in keeping with the times, there is a Facebook page for Japanese research.