Kato's appearance alongside Ando in this regard is largely coincidental however, as Battle Royale II was released eleven months after TOKYO 10+01.

In Neo Tokyo in 2XXX A.D., eleven strangers, each with various criminal backgrounds, awaken in a deserted warehouse where they are confronted by the mysterious Mr. K, the manager of the Black Papillon Foundation.

The latter is triggered when "hunters", who work for the Black Papillon Foundation and are armed with non-lethal laser guns which will knock the participants out of the game when they are shot, come within 50 meters.

The first indication that things are not what they seem occurs shortly into the game when Big Mac is shot and killed by some hunters, revealing that the players must now try to survive against opponents with real firearms.

Fake decides to kill a member of his team, but the arrival of some hunters and Coco's quick thinking result in his apparent demise, while Prince is shot and falls to his death.

Here he is greeted by Mr. K, and it is revealed that the two colluded in order to enable Mr. K to take over the Black Papillon Foundation, while Snake would be delivered the man with a crescent-shaped scar on his forehead who killed his parents years ago.

Mr. K rigged the game set up by his father by adding actual deaths as a factor to kill off his siblings, and he also turns out to be the very man with the crescent-shaped scar who Snake seeks vengeance against.