As written in 'Arakan Ichidai' (The Life Story of Kanjuro ARASHI), with the support of the right-wing group called Kokuryu-kai, Tachibana was a real tycoon to whom even yakuza (the Japanese mafia) could not refuse.
「アラカン一代」にあるように立花のバックには右翼団体黒竜会がついておりヤクザも歯が立たない大物である。