Just after Kenshin and Asadaku led dozens of banners to Zenko-jihei, Chausuyama and other places to investigate, Kenshin made a decision - to wait for Takeda Shingen's team to arrive in Kita-Shinano and then arrange the main camp on Mt. Tsumi-me. The location of Mt. Tsumame happened to be out of the tangle of the Hikawa, Chikuma River, Shiozaki Castle, Asahiyama Castle, and Kaizu Castle, and it was also free from the danger of being divided and surrounded by the Takeda army. And the height of Mt. Tsuma is high enough to have a bird's-eye view of the Takeda Army below. On another level, Kenshin seems to be easily surrounded by the Takeda Army on the surface, but he is able to monitor any movement of the Takeda Army and control the battlefield form in his own hands.

After that, Kenshin also spread the text of the crusade against Takeda Shingen all over Koshin, and the content made the entire Takeda family angry with this text, causing Takeda Shingen to speed up his pace and go to Kaizu Castle.

The content of the inscription: "You don't know the timing, you have plundered the two states of Jiaxin, Wuwei does not destroy your fathers and ancestors, but you have repeatedly come out of the nameless army, and the people are poor." Thou resembles a floating slaughter, but you invade the realm of your son-in-law and set fire to the land. Thou hast not heard that Futu has five precepts, and that you regard a criminal as a thief? Murder is heavy, seize his city, rape his daughter, the so-called evil fornication. The old man forgets about the Futu, and he is happy and drunk, which is also a drinking abstinence. I tried to go to Beijing, trust you with the country, promise your alliance, and then I will invade my city, which is a lie. The division was nameless, the army was struggling, and many lives were intercepted. Although the Dharma is wrapped in clothes, it is only the appearance, which is no different from wrapping brocade with dung. I can't bear to sit and see it, so I condemn your sins. When he was young, he abandoned his father and seized the country, and he was not filial. ”

In the fourth year of Yonglu, March 20th. After the sound of the conch sounded in Iiyama Castle, the Uesugi army quickly came out of Iiyama Castle.

At the forefront of the Uesugi army was the pioneer Yamaura Kunikiyo with the Ojiji banner, followed by the Kakizaki Keike family holding the Uesugi family's family treasure Hachiman Imperial Bow, followed by Yamaura Kunikiyo, and then Saito Asanobu holding the black Hinomaru flag.

The three treasures opened the way, and Kenshin walked out of the Otemon Gate of Iiyama Castle, and after worshipping the treasures outside the Otemen Gate, he rode to his mount and released the moon hair. After successfully completing the departure ceremony, the Uesugi army began to act according to Kenshin's orders.

As usual, the vanguard of the Uesugi army was still dominated by Kitanobu servants subordinate to the Uesugi family, such as Yamaura Kunikiyo, Takanashi Hidemasa, Takanashi Yorikin, Takanashi Gentoshi (the fourth brother of Takanashi Masayori), Inoue Harugo (Inoue Masamitsu's second son), Hanamura Jinyoshi (the lord of Kaminoyama Castle), and Nobuta Takasheng (former murakami family retainer); In the second formation, Kakizaki Keijia, Saito Asanobu, Usami Dingmi, Okuma Asahide, Nagao Keiren, Nagao Keiqin and other important ministers are the mainstays; Katsunaga Shibe, Shitoyo Tsukiji, Keissuna Takemata, Nagahide Okawa, and Keinaga Yamamoto Temple formed the guerrilla army. Yasutsugu Osaki, Nagai Noshino, Iwai Nobuno, Suga Morino, Kojima Sadako, Hirako and other bannermen are the Chinese army; Naoe Keitsuna served as the chief of the small lotus pack, and together with the Tang people and generals such as Kohiro, Jimbo Kakuhiro, Kojima Zhizhen, Nagakeiren, and Noro Yazaemon, he led 10,000 troops to stay in Naganuma Castle and Suda Castle respectively, and was responsible for protecting the grain route and the small lotus pack.

Kenshin led the banner and led the crowd to lead the army of more than 48,000 into Kawanaka Island. The Uesugi army first crossed the Hinogawa River and then the Chikuma River. Just when everyone thought that Kenshin was going to besiege Kaijin Castle, Kenshin led his army to Mt. Tsumi, two kilometers west of Kaijin Castle, and set up a camp on Mt. Tsuma-nō, while Asadano led 18,000 troops to garrison Mt. Saijo, not far from the eastern side of Tsume-me Mountain.

Not long after Qian Xin reached the top of Mt. Wife and Daughter, he found that heavy black smoke rose from the bottom of Haijin Castle. Subsequently, Saito Asanobu came to Kenshin's back and reported: "The Kaizu Castle Keeper Oyamada Bichumori sent someone to burn down all the castle towns outside Kaizu Castle to show his intention to hold on. ”

"Haijin Castle has been renovated under the general request of the Takeda family, and it has only been completed for less than half a year, how many houses outside the city can be burned down? Koyamada is probably too pretentious. Yamaura Kuniqing said after sneering.

In Japan's Warring States period, most of the so-called castles were defensive castles, except for a few castles such as Kyoto and Dazaifu, and the forts contained only military facilities and houses where soldiers would live, and all commercial and handicraft areas, as well as the residences of related people, were outside the castle, which was called castle town. The besieging side often burned the castle town to destroy the castle's economic strength, and also used various materials in the castle town to provide siege warfare. At present, the number of Uesugi troops is huge, and it is inevitable that the Takeda army in Kaijin Castle will not be able to go out of the city to meet it, but can only stick to Kaijin Castle and not go out. In this case, it is better to burn down the castle town first, so that the materials will not be used by the Uesugi family.

"Since the Imperial Palace doesn't want to take the initiative to pull out the nail of Kaijin Castle, then let the minister lead the army to sweep the surrounding Takeda Fangcheng Castle Soldiers. If there is any rescue move in Haijin City, then our army can quickly send troops to capture Haijin City. Kakizaki Keijia then spoke to Kenshin.

"Oyamada Bichu Mamoru and the others will not go out of the city, if they take the initiative to go out of the city to rescue other places, the lords of Okushinano who belong to the Takeda family will not abandon Yoshiwa Mountain Castle, Akasawa Castle, Yokota Castle, Toguchi Castle, Kaneiyama Castle and other places and enter Kaizu Castle to hold on." Kenshin can only wait for Takeda Shingen to lead his army into the area of Kawanaka Island, otherwise he will not be able to grasp the initiative on the battlefield.

At this moment, the reason why Takeda Shingen was not in a hurry to lead more than 65,000 troops into Kawanaka Island was because he wanted to see if Kenshin and Asada would be impatient and take the initiative to attack Haijin Castle, which was only garrisoned by more than 1,000 old, weak, sick and disabled people.

When Hosaku under his command detected that the Uesugi army had climbed Mount Tsumo and Mt. Saijo to set up a formation, Takeda Shingen neither went to attack nor directly reinforced Kaizu Castle, but continued to march westward, reaching Mt. Chausu in the northwest of Mt. Tsuma and setting up his own camp there.

As Takeda Shingen led his army to enter Mt. Chausu, he cut off the way for the Uesugi army to return to Japan, and it also made it impossible for tens of thousands of Uesugi troops such as Naoe Keitsuna, Tang to kinhiro, Jimbo Kakuhiro, Kojima Zhizhen, and Nagakeiren to smoothly transport grain and grass to Mt. Tsumime and Mt. Saijo. In this way, after the two armies confronted each other for more than ten days, Kenshin came up with a plan to deal with it after summoning a few cronies and important ministers such as Asada, Usami Dingmi, and Saito Asanobu to discuss. Subsequently, Kenshin began to show impatience in front of everyone, and every day he sent a small number of troops to the Takeda army gate to shout insults, and Takeda Shingen was not to be outdone, and every night he sent Hosaku ninjas who accompanied the army to the Uesugi army camp in Mt. Tsusa and Mt. Saijo to beat the famous song "Hachitori" with small drums, so that the appearance of the Uesugi army looked exhausted.

However, after waiting left and right on Chausu Mountain for half a month, Takeda Shingen, who has always acted as fast as the wind, searched for his own camp everywhere, and wanted to cut off his own head, but this time he unexpectedly calmed down, stayed motionless on his wife and daughter mountain, and did not really lead the army down the mountain to fight. Takeda Shingen couldn't make a plan, and he had another plan. On April 15, Takeda Shingen, who was carrying the banner of his grandson's four mantras, crossed the Hachimangahara between the Rhikawa River and the Chikuma River with great fanfare, and entered the Kaizu Castle on the other side, where he joined more than 1,000 defenders including Koyamada Toramitsu in the castle, bringing the total number of Takeda troops to more than 66,000.

Just after Takeda Shingen led his army to leave Chausu Mountain, Kakizaki Keike and other important ministers asked for battle, hoping to attack on the flank of the Takeda army and eliminate the living force of the Takeda army as much as possible. However, Kenshin was unmoved, and directly ordered the whole army to continue to stand by and hold on to Mt. Tsumi-nu and Mt. Saijo.

Takeda Shingen's move to lead his army away from Chausu Mountain and head to Kaizu Castle was originally intended to lure the Uesugi army down the mountain and attack the Takeda army from the side, which was moving camp. Takeda Shingen prepared a total of two plans, first, he had sent someone to inform the defender of Kaijin Castle in advance, Koyamada Toramitsu and others, so that they were ready to wave their troops at any time and attack the Uesugi army near the Chikuma River; Second, Takeda's main army is divided into two routes, one is bright in the north, and the other is dark in the south, so after the Uesugi army rushes down Mt. Tsuma-me, so as to form a north-south encirclement trend, and the defenders of Kaizu Castle such as Koyamada Toramitsu are sneaking attacks on Mt. Tsumizu and Mt. Saijo.

However, just as in the Battle of Yiting in the Three Kingdoms period at the end of the Han Dynasty, Liu Bei also used the strategy of moving the camp, but he was not able to hide from the enemy general Lu Xun, Lu Xun was moved by the enemy but did not move, and Takeda Shinxuan's strategy could not hide from Qianxin and Chaoding. Kenshin was unmoved by the fact that he was perched on top of Mt. Tsuma-nō, overlooking the vast plains, overlooking the Chikuma River and Kaizu Castle, and the Takeda Army, which seemed to be able to easily cut it off in a long snake.

In the end, the main team of the Takeda army drove peacefully into Kaizu Castle, with a total strength of more than 66,000, and the more than 48,000 Uesugi troops were far away, and the two armies once again fell into a state of seemingly insoluble confrontation.

At this time, the battlefield situation between Takeda and Uesugi was very delicate. The main force of the Takeda Army was around Kaizu Castle, and the main force of the Uesugi Army was in the southwest of Mt. Tsumime and Mt. Saijo, that is to say, the Uesugi Army cut off the communication between the Takeda Army and its Keye and Suwa hinterland, and could cut off its rear supplies at any time, and the Takeda Army also cut off the communication between the Uesugi Army and its Echigo Ability, as well as the follow-up troops of Naganuma Castle and Suda Castle, and could also cut off the enemy's supply at any time. However, Echigo was relatively close to Kawanakajima, Naganuma Castle and Suda Castle were even closer, while Kai and Suwa were farther away, and the Takeda army outnumbered the Uesugi army, so the logistical pressure was even more obvious.

Takeda Shingen was deeply distressed by this, and his brows were furrowed. As a result, he had no choice but to gather his generals in the Honmaru of Kaizu Castle to discuss countermeasures. The Takeda army is in battle against the city, and the Uesugi army is condescending, both of them are in a situation where it is easy to defend and difficult to attack, and no one dares to attack first, so should they continue to face each other like this? Is there any way to break the game?

Just when the generals of the Takeda family were talking about it, but no one could come up with a good countermeasure. Eventually, Takeda Shingen turned his gaze to his cronies, the military advisor Kansuke Yamamoto: "Kansuke, do you have a good plan?" ”