Nakanishi accepted the temporary leadership position after the assassination of Masahisa Takenaka, but was never considered an official kumicho (supreme Godfather) of the Kobe-based gang, despite heading it from 1985-1989. In 1989, Yoshinori Watanabe was elected as fifth kumicho.
After Watanabe's accession, Nakanishi continued to work for the gang as a senior advisor and leader of 15 sub-gangs in Osaka. He died in September 2003.