Shinichiro Sano was the eldest sibling in the Sano family, revered as a hero and role model by his younger siblings: Manjiro “Mikey” Sano, Izana Kurokawa, and Emma Sano. Charismatic and empathetic, Shinichiro possessed a unique ability to bring people together, often setting aside differences for the greater good of others. Despite his weakness in combat, Shinichiro was widely respected in Japan’s delinquent world as the founder and First Generation President of Black Dragon, one of the most notorious gangs of its time. His leadership was marked by humility and compassion, earning him admiration not only from his gang members but from rivals as well. Even years after his death, later generations of Black Dragon members continued to honor his memory and hold him in high regard.

Shinichiro had a deep passion for motorcycles, frequently working on them in his garage. His workspace became a refuge for fellow delinquents, who would visit to relax and seek advice. His prized possession was his motorcycle, which he later passed down to his younger brother, Mikey.

Tragically, Shinichiro’s life was cut short on August 14, 2003, at the age of 23. While attempting to steal a motorcycle from his shop as a gift for Mikey, Keisuke Baji and Kazutora Hanemiya were caught in the act by Shinichiro himself. Unaware of his identity, Kazutora, in a panicked attempt to protect Baji, struck Shinichiro with a pair of bolt cutters, fatally injuring him. His untimely death became a pivotal moment in the delinquent world, deeply affecting many of the story’s main characters.

Even after his passing, Shinichiro’s legacy continued to influence those around him, including his siblings and others within the delinquent community. His impact on those he left behind played a significant role in shaping the motivations and actions of several key figures throughout the series.

Takeomi Akashi, Wakasa Imaushi, and Keizo Arashi
As close confidants and founding members of Black Dragon, these three delinquents shared a deep bond with Shinichiro. They looked up to him as their leader and admired his sense of responsibility and vision for the gang, even long after his death.

Seishu Inui
As a later generation member of Black Dragon, Seishu respected Shinichiro’s legacy and viewed him as a figure who stood for the original values of the gang before it turned more violent in subsequent generations.

Haruchiyo Sanzu
Haruchiyo was one of the few people aware of Shinichiro’s time-leaping ability. He also acted as Shinichiro’s trigger for the time-leap that saved Mikey from his vegetative state. However, this incident also revealed Mikey’s dark impulses, which troubled both Shinichiro and Haruchiyo.

Hinata Tachibana
Shinichiro saved both Takemichi and Hina from middle school bullies in an alternate timeline where he successfully time-leaped to save Mikey. This act significantly impacted both Hina and Takemichi’s futures.

Tetta Kisaki
While Shinichiro and Kisaki never met in person, Kisaki witnessed Shinichiro rescuing Takemichi and Hina from bullies. This event occurred in an alternate timeline after Shinichiro successfully saved Mikey from his vegetative state.

Authority
Shinichiro Sano was a legendary figure in the world of delinquents, highly regarded for his ability to lead and inspire others. As the founder and First Generation President of Black Dragon, one of the most powerful delinquent gangs in Japan, he held complete command over its members. His leadership was characterized by guidance, wisdom, and an unshakeable sense of responsibility, which allowed him to command some of the strongest delinquents of his time. Even after his death, Shinichiro’s name remains synonymous with respect and admiration in the delinquent circles. Members of both older and newer generations speak highly of him, praising his ability to unite delinquents from all walks of life under a common banner.

Fighting Prowess
Despite his legendary status, Shinichiro was known to be a poor fighter. Many of the delinquents who followed him were far stronger in physical combat. However, in rare instances, Shinichiro exhibited moments of immense strength, such as when he cracked a wall with his fists during a fit of extreme rage. In an alternate timeline, he was shown to have beaten a group of thugs on his own, displaying a capacity for violence when pushed to his limits. Nevertheless, his true strength lay in his leadership and charisma, not in his fighting ability.

Charisma
Shinichiro possessed extraordinary charisma, which made him stand out as a leader even though he lacked physical strength. His humility, kindness, and willingness to stand up for others drew people to him, making him universally respected by both his allies and rivals. His ability to inspire loyalty in others was unmatched, allowing him to not only lead Black Dragon but also earn the respect of delinquent gangs across Japan. His reputation as a leader of integrity and compassion continued to influence many characters even after his death, cementing his place as a figure of admiration in the delinquent world.

Time Travel
Shinichiro once wielded a supernatural time-leaping ability, which allowed him to travel back in time. He only used this power once to alter the timeline and save his younger brother, Manjiro (Mikey), from an accident that would have left him in a vegetative state. After successfully altering the past, Shinichiro transferred his time-leaping power to Takemichi Hanagaki, after rescuing him and Hinata Tachibana from middle school bullies. This transfer ultimately enabled Takemichi to use the ability to alter future events and prevent tragedies.