Waterboys (film)

 is a 2001 Japanese comedy film written and directed by Shinobu Yaguchi, about five boys who start a synchronized swimming team at their high school. The film stars Satoshi Tsumabuki (Suzuki, the leader of the team), Hiroshi Tamaki (Sato), Akifumi Miura (Ohta), Koen Kondo (Kanazawa), Takatoshi Kaneko (Saotome) and Naoto Takenaka (the dolphin trainer).
The film was a success in Japan, and was nominated for eight prizes at the Japan Academy Prize, winning awards for 'Best Newcomer' and 'Best Music Score'. A spin-off television series entered its third season in 2005.
Plot.
Suzuki is a high-school student who aspires to become a great swimmer; however, he is the only person in the school's swimming team. Soon, a beautiful new swimming teacher starts work at the high school. Dozens of boys decide to join the swimming team, but when they realize that she teaches synchronized swimming (which is generally a women's sport), all but Suzuki and four other boys drop out. The teacher soon takes maternity leave, and for some time the team is on hiatus. However, when Suzuki watches a dolphin show he decides to ask the dolphin trainer to be their coach.
The dolphin trainer exploits them as free labour and has no intention of training them, and in an attempt to ditch them, leaves all his cash with them to have to practice "rhythm" using "Dance Dance Revolution". When he runs out of gas, he returns to get some money and discovers that they are totally synchronized and doing well with the game. He takes them back and they continue to train. Later, while training in the sea, a tourist with a video camera films them, thinking that they are drowning, and the boys appear on TV. Seeing this, the boys who had quit rejoin, and are taught synchronized swimming by the five boys.
Before the festival, the pool is drained when the water is used to fight a fire that is caused by a fair attraction, but the neighboring girls' school allows them to use their pool. The performance turns out to be a great success.