Abstract
Bekanbeushi Wetland is located in Eastern Hokkaido, Japan. It consists of a large low-moor and isolated high-moors and preserves natural flora of acid low-moor. We collected diatoms from a wetland high-moor in November 2008 and May 2009. A total of 7 diatom species belonging to 4 genera were identified. Dominant species were Pinnularia subcapitata var. elongata in the November 2008 samples and Eunotia bilunaris var. bilunaris in the May 2009 samples.