In Tokyo Bay Area, there is an oyster farming - to assist in cleaning the water pollution in the Bay.  The presence of Oyster farming helped maintain the level of water quality so that people could go and play at the beach during summer season: (in Japanese) http://matome.naver.jp/odai/2137392386576133201 Up in further north of Tokyo, there is a big oyster farming ground, which was devastated by the Great Eastern Earthquake years ago. Slowly recovering I believe.

Published by

In Tokyo Bay Area, there is an oyster farming - to assist in cleaning the water pollution in the Bay. 

The presence of Oyster farming helped maintain the level of water quality so that people could go and play at the beach during summer season: (in Japanese) http://matome.naver.jp/odai/2137392386576133201

Up in further north of Tokyo, there is a big oyster farming ground, which was devastated by the Great Eastern Earthquake years ago. Slowly recovering I believe.