Now we may think that Toyotomi Hideyoshi's idea is absurd. But in Toyotomi Hideyoshi's view, such a goal is not unattainable. It can even be said that it will be realized. Why do you say that?
First, Toyotomi Hideyoshi started from the bottom ronin, worked hard all the way, and finally unified Japan as the supreme commander (Guan Bai), which made him confident enough.
From personal experience, Toyotomi Hideyoshi was abused by her stepfather when she was a child and was kicked out of the house. Later, he acted as a servant and carried shoes for others. Later, I went to Nobuyuki Oda's home to equip myself, and later became a member of General Nobuyuki Oda. Finally, when he was murdered by his subordinates, Nobuyoshi used his outstanding combat capability and excellent diplomatic means to replace the Oda family, surrendered to the Tokugawa family, the Chai Tian family and other big warlords, and finally conquered the four countries, unified Japan and became Guan Bai. This is simply a miracle of life. People who have this miracle of life must feel that there is nothing impossible in the world. So it is also possible to conquer China and dominate Asia.
Judging from Japanese history. During the Warring States period, Japan experienced a history of nearly 200 years, in which there were wars and annexation among major families. How many celebrities (heads of families, equivalent to princes of China) were ambitious for reunification, but they were all defeated in the end and had to commit suicide by caesarean section. No one achieved the goal of unification, but Toyotomi Hideyoshi did. He changed Japanese history, just like Qin Shihuang in China. Since Toyotomi Hideyoshi thought he could change Japanese history, he certainly thought he could change the history of Korea, Ming Dynasty and even Asia.
Second, judging from the history of the Sino-Japanese War, Toyotomi Hideyoshi is confident enough.
Although China and Japan fought for the first time in the early years of the Tang Dynasty, Japan lost. However, there were two wars since then, which made Toyotomi Hideyoshi think it was not impossible to defeat the Ming Dynasty.
First, Kublai Khan's two attacks on Japan in the Yuan Dynasty ended in failure. You know, the Genghis Khan family who can defeat the world can't even beat Japan, and Japan's combat effectiveness in the world can be imagined.
Second, the Ming Dynasty fought a small-scale war with Japan along the coast for many years. Although under the leadership of the Ming generals headed by Qi Jiguang, they defeated the Japanese. However, the Japanese who took part in the battle were only some Japanese ronin and Japanese businessmen, almost equivalent to pirates, and the scale was not very large. But even so, it still hurt the scalp of the Ming Dynasty. Toyotomi Hideyoshi thought, if the Japanese used the power of the whole country to fight the Ming Dynasty, would the Ming Dynasty still be an opponent?
Third, the Ming Dynasty and North Korea did not fight for many years and were defeated by North Korea. They are no match for the battle-hardened Japanese army.
At that time, Liu Yun's regime in korean king valued literature over martial arts, and its combat readiness was lax. Soldiers have not known soldiers for many years. They are completely inexperienced in fighting. This, Toyotomi Hideyoshi is very clear.
The situation in the Ming Dynasty was similar to that in Japan. Emperor Wanli didn't go to court for decades, and the civil service groups in the DPRK were busy intrigue, and the jurchen in the border was ready to move, but there was no war yet. It can be said that everything is in the storm. Toyotomi Hideyoshi thought that as long as he raised his arms and shouted, the mountains and rivers of the Ming Dynasty would soon fall apart.
Fourth, Japan's minimum goal is at least to win North Korea and use North Korea as a springboard to seize the Ming Dynasty.
Even if you can't beat the Ming Dynasty for a while, it is certain to win North Korea in World War I. As long as Japan acquires North Korea, it will be easy to consolidate this base area of North Korea and then use it as a springboard to attack the Ming Dynasty. So we can see that when Toyotomi Hideyoshi occupied most cities in North Korea with 200,000 troops in one month, he could not wait to move the capital to North Korea. His intention to base in North Korea is very obvious.
However, Toyotomi Hideyoshi did underestimate the territory, economic strength and military strength of the Ming Dynasty. Toyotomi Hideyoshi basically knows nothing about this. As a result, in the Ming Dynasty, only 70,000 soldiers were mobilized and brought their own food, and all of them won the war. Like Qin Shihuang, Toyotomi Hideyoshi's mountains and rivers perished the next year, and Japan entered another era: the Tokugawa shogunate era.