The 住吉会, sometimes referred to as the `Sumiyoshi Union`, is the second-largest yakuza group in Japan with an estimated 20,000 members. == Outline == The Sumiyoshi-kai is a confederation of smaller gangs. Its current sosai, or president, is Shigeo Nishiguchi. Structurally, the Sumiyoshi-kai differs from its main rival, the Yamaguchi-gumi. T.....