Otoya Yamaguchi was a great man, in a time where the JSP was struggling between the communists demanding more and their party fracturing, he delivered the killing blow from which they never really recovered. Fun fact the guy he killed "Inejirō Asanuma" and the socialist party he lead was behind the protests to throw out the "US-Japan Security Treaty" and just a few months before his death he had visited Communist China and declared the USA a shared enemy of China and Japan.