Ryo Katsuji (born August 20, 1986 in Tokyo) is a Japanese actor. He graduated from Horikoshi High School. Description above from the Wikipedia article Ryo Katsuji, licensed under CC-BY-SA, full list of contributors on Wikipedia.
It is 300 years into the future. Earth's environment had been devastated by mankind's own foolish plans and humankind is beleaguered by the sentient forests which they have awoken. The world balance is tipped when a young boy named Agito stumbles across a machine that glowed in a strange blue hue inside a forbidden sanctuary.
A Japanese girl struggling to fit in at her new school teams up with a reclusive neighbor to find out what happened to an upperclassman who disappeared under mysterious circumstances.
It's three years after the events of the original Battle Royale, and Shuya Nanahara is now an internationally-known terrorist determined to bring down the government. His terrorist group, Wild Seven, stages an attack that levels several buildings in Tokyo on Christmas Day, killing 8000 people. In order for the government to study the benefits of "teamwork", the new students work in pairs, with their collars electronically linked so that if one of them is killed, the other dies as well. They must kill Nanahara in three days - or die.