ビジネスマン必勝講座 ヤクザに学ぶ 経済戦術

Overview

Sometimes, yakuza must face shrewd civilians even more cunning than themselves, armed only with ethics. What are the 'negotiation tactics' you can learn from yakuza beyond fights and threats!? The unparalleled negotiation skills of the yakuza, refined to perfection, are now revealed!!