Kai Kingdom was one of the ancient Japanese imperial states (yamanashi prefecture in central Honshu Island) and was ruled by the Takeda clan, a descendant of Silla Saburo Yoshimitsu of the Kiyowa genji clan during the Sengoku period. During the Muromachi shogunate, the Kai kingdom came under the jurisdiction of the Kwantung Gongfang (the representative of the Ashikaga shogunate in the Kanto region), and the Takeda clan was guarded by the Kapi kingdom for generations from Takeda Nobuyoshi (Shingen's ancestor).

Kai Province
In the 23rd year of Theo dynasty (1416), the Takeda clan passed to takeda Nobuman's era, and the "ZenShu Rebellion" broke out in the Kanto region, and the Kanto governor Uesugi Clan Ken (legal name "Zenshu") rebelled, and The Takeda Nobumitsu, the guardian of Kai, participated in the rebellion as The brother-in-law of Zenshu.
After the rebellion was put down by the shogunate in the 24th year of YingYong (1417), Takeda Nobuman committed suicide at Mount Kisho, and the Kai clan fell into a situation of hegemony, guarding the Daijibu clan to take advantage of the opportunity to rebel, the Takeda family faced the danger of "Shimo kagami", the Kai clan was controlled by the Shimobe clan, and even the ancestral family treasures, the Imperial Banner and the Kashi no Armor, were also kept by the Shibu clan, but the good family governor passed to Takeda Nobunaga, who would have a "forbearance" character, he secretly accumulated strength, developed strength, and finally defeated the Shibu clan in the sixth year of Kansho (1465), The Trace Clan Overseer of the Trace Department Jing Family cut its abdomen under the castle, and the civil strife among the Kai people that had lasted for nearly half a century finally came to an end.
The royal flag and the rafters are unarmored
Flag
No armor
Samurai Kirii
The Takeda family seems to have a tradition of "father is not kind to the son and not filial piety", after Takeda Nobunaga revived the Takeda family, The Kafei country began to be in civil strife because of the succession of the family governor, Nobunaga liked his jiro Yaukawa Nobue (at this point Shinho and his grandfather were quite similar), and hated the eldest son Shinjo, Japan was influenced by the Traditional Chinese Confucian thought, all of which were the primogeniture inheritance system, which should have been the eldest son Shinjo inheriting the position of the family governor, but because Nobunaga wanted to pass on the position of Nobuhide, civil unrest broke out. In the first year of the Ming Dynasty (1492), the Kai kingdom revolved around the issue of the succession of the family governor, and the two sides stopped fighting, and the Kai kingdom also entered the Warring States era.
Takeda family tattoos
In the second year of Nagamasa (1505), Nobunaga died, and immediately after the fourth year of Nagamasa (1507), Nobunaga died, because of his untimely death, there was a civil unrest in Kai province that was inherited by the family governor, and Shinjo left his eldest son Nobunaga (later Takeda Nobunaga) who was only 14 years old to inherit the position of Takeda family governor, because of his young age, his uncle Yaukawa Nobue saw the opportunity to become the takeda family governor, because Nobunaga was young, plus he had many soldiers, and he did not pay attention to his nephew at all. It was when Nobue thought he had the chance of victory, and one late night in October of the fifth year of Nagamasa (1508), Nobunaga led a small number of his cronies from Theojo Ishi and Kawadakan to attack his uncle's Katsuyama Castle at night, and achieved a great victory. After the fifteen-year-old Shinnaga campaign, he gradually eliminated the hostile forces in the country one by one, and finally after nearly a century of turmoil, the Kai Kingdom regained its unification, and Takeda Nobunaga (Nobunaga) also completed the transformation of the Takeda family from guardianship to sengoku daimyō after sweeping away the domestic opposition forces.