Did you know? (I didn’t.) The National Diet Library (NDL) has a digital archive portal, PORTA, which not only lets you search their own digital holdings but an amazing array of other databases, digital libraries, and archives in Japan.
What’s wonderful about this portal is that you can click to expand the list of resources it will search, and beside restricting your search to specific ones, you can also simply use it as a way to discover new online resources relating to Japan and beyond. I myself learned a lot from poking around PORTA in the past few days while looking at digital archives for a course at the School of Information.
I will write more about this portal later, but a quick link for those who would be interested in using it.
And yes, there is an English version of PORTA (accessed by clicking “English” at the top of the page) that provides English translations of the digital archive titles.