TV Special
Description
Nobuyuki Sanada, eldest son of Sanada Masayuki and older brother of Yukimura Sanada, trained alongside his brother under Takeda Shingen in their youth. This forged a strong protective instinct toward Yukimura and a drive to uphold the Sanada name. After the Takeda clan's fall, he defended Ueda Castle against Tokugawa Ieyasu alongside his father and brother.

To secure clan survival amidst shifting alliances, he entered Tokugawa service via political marriage to Komatsuhime (Ina), daughter of Honda Tadakatsu and adopted daughter of Tokugawa Ieyasu, ensuring the Sanada lineage. During the Sekigahara conflict, he sided with the Tokugawa-led Eastern Army, opposing his father and brother in the Toyotomi-aligned Western Army. Following Tokugawa's victory, he successfully negotiated to spare their lives, resulting in exile instead of execution. Ueda Castle and its domains were granted to him.

His conviction prioritized long-term stability under Tokugawa rule over immediate familial loyalty. At the second siege of Ueda Castle, he dueled Yukimura, sparing him after victory and placing him under Hidetada Tokugawa's custody. He later fought for the Tokugawa at Osaka Castle against Yukimura, who had escaped exile to defend the Toyotomi. After Yukimura's death in battle, he honored his brother's final wish to preserve the Sanada clan, vowing symbolically to protect the cherry blossoms representing Yukimura's legacy.

Alternate paths depict him abandoning Tokugawa allegiance to defend Osaka Castle alongside Yukimura, repelling Ieyasu's forces twice. In this outcome, he spared Ieyasu's life and collaborated with both factions for peace. However, in the primary timeline, he accepted his role as Yukimura's adversary to fulfill his duty. After Osaka, he governed as lord of Ueda, Numata, and later Matsushiro Domain, living until age 92. His actions ensured the Sanada clan endured beyond the Sengoku period.

Physically, he stands 188 cm tall and wields a nagamaki with a retractable secondary blade. His personality contrasts with Yukimura's impulsiveness, exhibiting calmness and strategic foresight. He consistently balanced familial affection with political pragmatism, driven by anxiety for Yukimura's safety and a resolve to prevent the clan's destruction. His internal conflict between brotherly loyalty and perceived necessity defined his narrative arc.