Asama Onsen

 is an onsen located in the city of Matsumoto, Nagano Prefecture, Japan.
The "Asama Hot Spring Center", also known as the "Hot Plaza Hall", has a configuration typical of many Japanese onsen with separate areas for males and females; each area contains multiple indoor pools, saunas and two outdoor pools, one hot and one cold. The published temperature range of this onsen is 42-47 degrees Celsius.
Between 1969 and 2011, Asama Onsen included an open-air speed skating rink.