1940s Japanese Menko cards?

[jjbond]

(I'm not sure which forum section this should be posted in. I apologize if there was a better section for this question)

Over the past few weeks I've started getting interested in looking at old Japanese baseball cards. (I've started learning the language, so this seemed like an interesting and related challenge). I even downloaded Engel's Japanese Baseball Cards Checklist.

Does anyone else collect these? I get that it'd be challenging to find a lot of these, but I'm unexpectedly challenged by matching Menko cards to the checklist (do I assume most things I'm looking up are just unlisted?) It sounds like anything before the '40s is impossible to get, but it looks like there's a lot of nice vintage cards to track down. (and I had thought Meknos would be easier to start with than Bromides...)