Ten: Tenhodōri No Kaidanji (Ten - The Nice Guy on the Path of Tenhou) is a mahjong centric Japanese manga written and illustrated by Fukumoto Nobuyuki. It was first published in 1989 in Kindai Mahjong Gold and finished in 2002. Considered a hit in Japan, it was followed by spin-off focusing on one of the opponents, Akagi: Yami Ni Oritatta Tensai and began a series.
This tag implicates fukumoto_mahjong (learn more).