The Japanese lacquers are based on urisol , the active irritant in
poison ivy and its relatives. It is toxic and as such I understand
that it is not permitted import into the US. I looked into this a
couple years ago and may have the findings in old computer file..
Maybe I can find it. There were supposed to be a few firms that had
it then but the finding was that "supposed" was the active term.
They were was listed but not available.