Daisuke Yamaguchi

Daisuke Yamaguchi' (山口 大介 Yamaguchi Diasuke) is a photographer with Weekly Mahjong Today'' at the Nagano Prefecture tournament and the 71st Inter High School Mahjong Championships.

Personality
Daisuke appears to have a fascination with Nodoka Haramura's breasts.

Prefectural Tournament Arc
Daisuke is the first person to suggest a connection between Kiyosumi High School's Saki Miyanaga and Shiraitodai High School's Teru Miyanaga after watching Saki play in the final match of the Nagano tournament.

National Tournament Arc
He was present along with Junko Nishida in the tournament halls. He did not make the trip with her to investigate the Miyanaga household and instead stayed behind with Kumiko Hanibuchi

Etymology

 * The name Daisuke means "big, great" (大) (dai) and "forerunner, herald" (介) (suke).
 * Daisuke's surname Yamaguchi means "mountain, hill" (山) (yama) and "mouth, entrance" (口) (kuchi/guchi).