Ishii Tsuyoshi is the younger of the Ishii brothers and, together, they were the leaders of the biker gang known as the Invincible Rats in the South Prefecture.
Plot[]
The Tsukamoto-Nanamori Alliance[]
After a confrontation with Parko and his friends, Teru, Kiiko, Kizu and Jinnai, the Invincible Rats disbanded. Seeking refuge, the brothers fled to Toarushi, where their cousin Yagisawa Akira resided [1]. They attempted to leverage The Tsukamoto-Nanamori Alliance for their own goals by overthrowing the Kurotaki Alliance but faced defeat.
The Kurotaki Alliance[]
Convincing Akira to join the Kurotaki Alliance, Takeshi and his brother intended to use the alliance's protection against Parko's relentless pursuit [2]. Upon meeting Bulldog, however, they regretted manipulating the Alliance. Before they could confess, Bulldog suffered a severe accident and was hospitalized [3].
Despite intending to surrender peacefully to Teru and Kiiko, the lack of leadership within the Alliance escalated tensions. Facing the inevitability of a fight, they rallied Kurotaki's members. Takeshi ambushed Teru with a steel pipe, but the confrontation was interrupted by Parko. Jumping in front of his brother, Tsuyoshi, Parko took the hit. The conflict concluded with both brothers knocked out by Parko.
Post Retirement[]
Following his retirement, Tsuyoshi found employment at Bulldog's father's company, Furukawa Ironworks [4].
