"Dietary Culture in Monsoon Asia based on the Research on fish sauce (soy sauce-like fish sauce) and Nare-zushi" (1990) written by Naomichi ISHIGE and Kenneth RUDDLE took plains in the northwestern part of Kingdom of Thailand and in Myanmar for instance, and described that the method to preserve seafood which was established along with rice cropping in paddy lands was handed down to subsequent generations.
石毛直道・ケネス・ラドル著『魚醤とナレズシの研究モンスーン・アジアの食事文化』（1990年）では、東北タイ王国やミャンマーあたりの平野部をあげ、水田地帯で稲作と共に成立した魚介類の保存方法が後に伝わったとしている。