Lord Manhai was a politician and samurai of the Warring States Period in Japan. He was born in 1592 and died in 1668. He was Toyotomi Hideyoshi's grandfather and also Toyotomi Hideyori's great-grandfather. Master Wanhai was a legendary figure. He had shown outstanding talent and talent when he was young. At the age of 17, he had become an outstanding samurai and was known as the "number one swordsman in Japan". He had participated in many wars and was awarded a commendation by the King of the Netherlands in the most famous war where he led the army to defeat the Dutch army. In his later years, Wanhai Ren became a supporter of Hideyoshi and assisted him in establishing the Japanese shogunate. Under his leadership, the Japanese shogunate carried out a series of reforms, including the implementation of the Jinmen Rebellion, which eliminated the forces opposing the shogunate and laid a solid foundation for the rule of the shogunate. Wanhai was also a person who paid great attention to morality and ethics. He advocated that samurai should be loyal to the country and the people and implemented a series of moral education and ethics education, which contributed to the moral cultivation of Japanese samurai. However, Reverend Wanhai's political career also encountered many setbacks and difficulties. He had opposed the shogunate's rule many times but failed. He died in 1668 at the age of 68. Although his political career was full of twists and turns and challenges, his moral character and contributions were still remembered by people.