What sports are popular as spectator sports?

Professional baseball always attracts a larse number of spectators.
Japan League professional soccer, rugby, and volleyball have a lot of young fans, while rugby is popular also with middle-aged people.
Young girls make up the greater part of enthusiastic volleyball fans.
TV viewers love broadcasts of baseball games and sumo wrestling bouts.
Broadcasts of Japan League soccer games and professional golf tournaments also have high audience ratings.
When the National Senior High School Baseball Championships held in spring and summer begin, the whole nation cheers the team that represents their prefecture. The fact that people get so excited over high school baseball games might seem odd to some foreigners.