Young Lions Tournament
The format of this tournament is: Round 1 16 under 20-and under 5dan pros vs. 16 insei. Insei take Black.
It is not explained in the manga how the later rounds work out.
The tournament is based off of a real children's tournament called the "Hosu Sen" ("Young Phoenix Tournament".)
Known winners in the manga:
2001-2002 : Akira Toya
2000: Atsushi Kurata