Watada-rengou (渡田連合) is an umbrella yakuza syndicate headquartered out of Chiba, JIS. It is an alliance of the Shotozumi-kai, the Nishidon-kai, the Karatsa-kai, and the Shigeda-kai, with a majority of the manpower and resources coming from the Yamaguchi-gumi boryokudan. Around 2021, most of the Watada-rengou boryokudan forced out or absorbed the smaller, non-allied Yakuza gangs. The Watada-rengou is believed to be heavily tied to the Great Eastern Dragon Ryumyo.
The Watada-rengo is described as part of the "Old School" or "Traditionalist" part of the Yakuza.
Individual boryokudan in the Watada-rengou