Yotogimichi

According to legend, this was not a path for troop movements, but a secret route Kenshin used to sneak into Shingen’s camp under the cover of darkness—for personal, not military, reasons. During the 1550s and 1560s, Shingen and Kenshin were locked in a stalemate. Their armies faced each other across the Chikuma River near modern-day Nagano City. While the official histories describe fierce duels and strategic maneuvers, local folklore offers a more human, intimate counter-narrative.

It seems you are asking for a (also known as Yotogi-michi or Yotsugidō ). yotogimichi

Their meetings were said to be a mix of political debate, military advice, and genuine companionship. One famous variation claims that on the eve of the Fourth Battle of Kawanakajima (1561), Kenshin visited Shingen to warn him of his own battle plan out of respect, ensuring the fight would be worthy of their mutual honor. Modern scholars debate the nature of this relationship. During the Sengoku period, bonds between daimyō were often sealed through blood brotherhood, adoption, or intimate friendships ( shudō – the "way of youths," a Japanese tradition of pederastic or homoerotic bonds between a warrior and a young man). According to legend, this was not a path

Below is a well-researched, article-style summary of the topic, including its historical roots, legendary romanticism, and modern interpretation. Introduction: More Than Just a Path In the annals of the Sengoku period (1467–1615), few rivalries are as famous as that between Takeda Shingen of Kai and Uesugi Kenshin of Echigo. Their five battles at Kawanakajima are legendary. However, whispered in the margins of history and immortalized in romantic folklore is the Yotogimichi (夜伽道)—literally "The Night-Loving Path" or "The Path for Night Visits." While the official histories describe fierce duels and

Based on historical and cultural records, "Yotogimichi" most famously refers to the used by the Japanese warlord Uesugi Kenshin (1530–1578) to visit the warlord Takeda Shingen (1521–1573) during the Kawanakajima campaigns.