An interview with Professor Hiroshi Hakoyama on the decline of invasive fish in the midstream of the Chikuma River was broadcast on the national broadcast of NHK Good Morning Japan!

On November 21, 2022, the national broadcast of NHK Good Morning Japan reported the results of a study showing that the number of smallmouth bass in the midstream of the Chikuma River has decreased and that native fish such as dace and oikawa have increased. The research was conducted by the Nagano Prefectural Fisheries Experimental Station as part of the Ministry of Land, Infrastructure, Transport and Tourism River Ecology Chikuma River Group, led by Professor Hiroshi Hakoyama of the Institute of Freshwater Biology. As a research group, we will work together to advance river ecological engineering research in the Chikuma River and Shinano River basins and contribute to flood control in the river basins.