Sōzu

is a gambler from Tanzaku Quarters in the Land of Fire.

Background
His den is one of the many visited by Tsunade off of whom he made a fortune. He normally proceeds to spend it all around Tanzaku Quarters. On another of her visits he and his cohorts could barely contain themselves and were very grateful for the money that Tsunade had lost to them.

Personality
It would appear that Sōzu likes gambling greatly and even more so when he wins. He was overjoyed that the Legendary Sucker had entered his gambling den that he and his cohorts could barely contain themselves.

Appearance
Sōzu has trimmed black hair, a goatee, dark eyes and wears a simple, black, loose-fitting kimono with white trimmings.

Search for Tsunade
During Jiraiya's search for Tsunade, he overheard him asking her whereabouts and told him after the Sannin had bought him a round of drinks.

In Other Media
Sōzu appears in Naruto Mobile as a constant rival for the player in the Tanzaku location. He fights with cards, throwing them at the opponent.

Trivia

 * Written as "索子", Sōzu is the Japanese term for mahjong bamboo tiles.