Hello, Re: a source for natural pearls, freshwater or salt in Japan,
I don't know anybody who handle them and I think nobody handle them
in Japan now. Most of Japanese pearls are cultivated. There is "Keshi"
which is about 1 to 2mm. size without nucleus, however this item is
also cultivated. There are not much wild pearl shells in Japan now
and probably it is very rare that wild pearl shell has pearl inside.