At eBay are two interesting Japanese coin albums. I've seen Toho Planning albums, but not these before...
Most of the coins are not very old. I have a similar one. The small aluminum 1 Sen coins are from the late 30s early 40s.
Here is the full album and key. Mine was missing most of the coins on page 1. I only paid $5, but had a blast looking up each one and learning Japanese numbers and dates. Mine were all glued in and pretty much had to tear up the album to get them out. You could have $50 worth of coins, depending on condition.
