Attached Link: http://www.cric.or.jp/cric_e/

First of all, I am not a lawyer, so my answer may be wrong. Second, more acurate answer may be given in the Copyright forum here.

Third: according to the attached web site, Japanese copyright law protects everything up to 50 Years after the creators death. So, if the pictures were done around 1800, even a very longlived artist probably has died before 1950.

So, I would think you can use them - if noone has altered them since.

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

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