The most popual sport in Japan is baseball. There are many basseball teams in Japan. People support to them. For example, go to watch baseball games, handshake event with baseball player, buy baseball goods and so on. Also, many boys play baseball and belong to baseball team. I think the most famous convention is "Ekiden". This is running convention. Many university students run to get first place. This mainly holds to new year's day. This can watch incandesce fight.