Date Masamune -Prequel-

A historical novel set in Japan's Sengoku period, starring Hiroyuki Sanada as the Shogun.
It's a creative take on historical events, imagining "what if" scenarios that differ from actual history.
It's a treat for history enthusiasts.
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Descriptions of characters in the novel and their historical counterparts:
Tokugawa Ieyasu: Modeled after Yoshiie Tiger Naga.
The images and sounds used in this novel are generated by AI.
For your reference, here are the historical facts below.
Historical context (various theories exist):
On August 3, 1567 (September 5, 1567), Date Terumune, the 16th lord of the Date clan, and his wife Yoshihime, the daughter of Mogami Yoshiyori and sister of Mogami Yoshiaki, welcomed their eldest son in Yonezawa Castle, Dewa Province.
In November 1589, following the Hojo clan’s invasion into Sanada territory, Toyotomi Hideyoshi dispatched forces for suppression. Since Masamune had an alliance with the Hojo clan since his father's time, he was conflicted until the last moment whether to fight against Hideyoshi or to join the siege at Odawara.
During Toyotomi Hideyoshi's Odawara Campaign in May 1590, Masamune was urged by Toyotomi’s subordinate Asano Nagamasa to join the siege at Odawara. He left Aizu on May 9th, traveling through Yonezawa and Okuni, passing through territories of his ally Uesugi Kagekatsu in Echigo and Shinano, and reaching Odawara via Kai Province. Considering the number of troops mobilized by Hideyoshi, Masamune submitted to Hideyoshi, who then confiscated the Aizu domain but confirmed the Date family's possession of 720,000 koku.
In September 1600, during the Battle of Sekigahara, when the Western army, led by Uesugi Kagekatsu’s retainer Naoe Kanetsugu, invaded Mogami territory (part of the Keicho Dewa Conflict), Masamune, who belonged to the Eastern army, dispatched 3,000 troops under his uncle Date Masakage. On September 25th, Motowaki Tsunamoto captured Yugahara Castle in Uesugi's territory of Katta District.
After the Battle of Sekigahara, with permission from Tokugawa Ieyasu, Masamune moved his castle to Sendai in 1601, beginning the construction of the castle and the castle town, thus establishing the Sendai Domain with Masamune as its founding lord.
Masamune was the only daimyo to receive the right to conduct foreign diplomacy from Tokugawa Ieyasu. He appointed his retainer Hasekura Tsunenaga and the Franciscan missionary Luis Sotelo as diplomatic envoys, sending a delegation of over 180 people to Mexico, Spain, and Pope Paul V in Rome (the Keicho Era Mission to Europe).
During the Winter Campaign of Osaka in 1614, Masamune positioned his troops at the Yamato front. After peace negotiations, the Date troops were assigned to bury the outer moat.
In September 1615, there was speculation that Masamune might be summoned after his son-in-law Matsudaira Tadateru fell out of favor with Ieyasu. From January to February 1616, Hosokawa Tadaoki instructed his son Tadatoshi to prepare for battle discreetly. After Ieyasu fell ill, he began to speak ill of Masamune, instructing Hidetada to prepare for a campaign in Tohoku. Masamune also prepared for battle upon hearing these rumors. However, Ieyasu expressed his intention to meet with Masamune, who traveled to Sunpu Castle on February 22nd. During their meeting, Ieyasu mentioned that Matsudaira Tadateru had accused Masamune of colluding with the Osaka side. After their discussion, Ieyasu cleared any suspicions and instructed Hidetada to protect his legacy, later instructing Masamune to support Hidetoshi upon his retirement as shogun.
After Ieyasu’s death in April 1616, Matsudaira Tadateru was dismissed, and his wife, Goro-hachi-hime, Masamune’s eldest daughter, returned to her family. Rumors of a campaign against Masamune circulated around August.
Masamune served until the era of Tokugawa Iemitsu, the third shogun. In 1635, when Iemitsu implemented the Sankin-Kotai system, declaring all daimyo to be treated as vassals, Masamune was one of the first to respond, declaring, "If anyone disobeys, let Masamune be ordered to subdue them," effectively preventing any dissent. As the era of Iemitsu continued, while many of the warlords who had been active on the battlefield had passed away, Masamune continued to visit Edo diligently despite his old age, earning him the affectionate nickname "Date no Oyakata-dono" from Iemitsu. Sometimes, Iemitsu would ask him to recount stories of battles and times with Hideyoshi and Ieyasu from the Sengoku period.
Masamune, who was cautious about his health, passed away on May 24, 1636, at the age of 70 (69 by Western reckoning). The cause of death is believed to be cancerous peritonitis caused by esophageal cancer. True to his reputation as a "stylish man," Masamune died with a spirit of not showing his death face even to his family.
Excerpted from Wikipedia.