Exports of Japanese caviar

In Japanese waters, fish and shellfish landings has decreased. Therefore, it has a force is put into aquaculture.
Various fish seafood has been farmed.
In recent years, also sturgeon, known for caviar has been farmed. Export of caviar will begin soon.

How do you think about caviar?
Because I have thought only from the coastal Caspian Sea, Japan production of caviar is a surprise even for me (* _ *)