【Moor Hot Spring Firefly Viewing】 Glowworms grown in the water of the Mole hot spring perform a dance of light. In the past, I was able to see fireflies around Tokachigawa Onsen. However, with the modernization of the city, the environment in which fireflies can live has decreased, and it is no longer possible to see fireflies at the end of the 1990 (Heisei 2) summer. The purpose of the revival of the firefly at Tokachigawa Onsen is to bring back the early summer scene that was previously common. One of the major features of the regeneration of fireflies is the use of hot spring water as a water source, and the spring quality of Tokachigawa Onsen is a rare "plant-based mall hot spring" in the world that contains a lot of plant components. Because it contains plant components, it contains a lot of minerals that are essential for the reproduction of diatoms, which are food for snails. This is the first time in Japan that fireflies have been successfully regenerated using 100% hot spring water. Heike fireflies were distributed from Kyushu to Hokkaido, Eastern Siberia and Korea, and inhabited many waterside environments surrounding wetlands and rice paddies. The characteristic of Hokkaido's fireflies is that the interval between their emission tends to be longer than that of fireflies in Honshu. Period:7/8(Sat)~7/23(Sun) Time: 20:00~21:00 Location: Tokachigaoka Park