Who will have the longest tail?

Players:

9 + people (1 game coordinator, and multiple players)

Objects:

Music and speakers

How to play: 

1. When the music is playing, players move around the playing area at random. When the music stops, each player finds the person closest to them and introduces themselves in Japanese. Then the player play janken (scissors, paper, rock)
    

2. The winner of the janken becomes the first person in the ressha (train), the person who loses stands behind and puts their arms on the shoulders of the person in front. The person at the front must memorise all the names of the people in their train.
    

3. The music starts again and the groups move around the room randomly until it stops again. This time, the person at the front of the train must introduce all the people standing behind them. Then, the two train leaders janken to see who is the winner, the losing train joins the back of the winning train.
    

4. At the end of the game, there will be two trains. The two train leaders must janken, if the leader of the winning train can introduce all the people in their train without a single mistake, then they win. If they make any mistakes, the train that lost the janken has a chance to win. If the leader of that train can introduce all the people in their train, then they win.
    

5. If neither train leader can accurately name all of their members, then there is a batsu (punishment) for both teams to be decided by the music player.