classification for Japanese verb with the dictionary form ending in "mu

The "Season for Familiarization with Forests and Lakes" began in 1987 and is a period (from July 21 to 31 every year) during which the Ministry of Land, Infrastructure, Transport and Tourism, the Forestry Agency, and the Japan Water Agency began educational activities to promote awareness of dams, dam lakes, water sources, and so on. During this period, various events are held at each dam.