I am researching these family lines... all are in my pedigree except Kunimura, which is a "lost" American branch of the Hanaoka family (see my other posts in this forum), and Sadayasu, who are cousins related to the Minami branch, but I'm not sure exactly where they connect.
Most branches originally from Yamaguchi Prefecture. Kunimuras split off in Hawaii. Sadayasus ended up in Texas. Other surnames either proceded to California and elsewhere on mainland (Minami, Fujishige, Hanaoka) or are from branches in Japan.