Write a realistic, plausible alternate history scenario in the form of a history book chapter completely set in the world of the alternate history scenario with absolutely no references to real life, OTL or that this is even an alternate history timeline at all, in which  the Ashikaga shogunate-ruled feudal Japan and Okinawa run by Toyotomi Hideyoshi at this point in time wins the May 23, 1592 – December 16, 1598 Imjin War against the Imperial House of Zhu-ruled Ming dynasty in the eighteen provinces of Han in the China region and the Ming dynasty's main tributary state, the Han Chinese-Korean Royal House of Jeonju Yi-Joeson Kingdom in Korea due to the assassination of Korean naval commander Yi Sun-sin and Hideyoshi consolidating his strength first, with Joeson changing vassalage from China to Japan and the position of King of Korea being filled by compliant Japanese daimyo, and the Ming becoming a Japanese tributary state in all but name, with Japan also taking Sakhalin and the Kurils during the Imjin Wars, Hideyoshi's son Toyotomi Hideyori and Tokugawa Ieyasu's granddaughter, Senhime have children together unlike in real life, and thus Hideyori's and Senhime's descendants become the shoguns of Japan after Ieyasu after the Tokugawa shogunate is formed in 1603, the Tokugawa shogunate conquers the Kingdom of Tungning in 1683 instead of the Qing, with a greater migration of Ming loyalist Han Chinese, Cantonese and Hui Muslims to Vietnam than in real life occurring as a result of this, leading to the formation of the Vietnamese side branch of the Imperial House of Zhu-ruled Empire of Vietnam in Vietnam in 1802 as an explicit modernization and continuation of the Southern Ming, albiet in a Vietnamized context with the Ngyuen Emperors of Vietnam reviving Ming, Song and Han-era customs, traditions and government and military practices and combining them with modern Westernizations and jurisprudence, building up a Western-style army and navy and making Laos and Cambodia both part of Vietnam, making the Sultanate of Brunei a Vietnamese tributary state and seizing Guangdong and Guangxi from the Qing during the Opium Wars, while also simultaneously avoiding Western colonization, making both Guangdong and Guangxi into Vietnamese provinces, the 1868 Meiji Restoration in the Tokugawa shogunate making the Tokugawa shogunate the local government of Japan, Okinawa, Taiwan and the Pengu Islands, Sakhalin and the Kurils and the Korean peninsula while the Japanese Empire formed by the Meiji Restoration becomes the Japanese national government, although the economic, military, industrial, technological and cultural growth that happened in Japan during the Meiji Restoration still happens like in real life, Japan still winning the 25 July 1894 – 17 April 1895 First Sino-Japanese War against the Qing like in real life, Japan still winning the 8 February 1904 – 5 September 1905 Russo-Japanese War, the 10 October – 1 December 1911 Wuchang Uprising in Wuchang, Hubei, China against the Qing still becomes the October 10, 1911 – February 12, 1912 Xinhai Revolution launched against the Qing, with the Beiyang Government as the first Republic of China still being formed on 1 January 1912 as the government of the fifteen provinces of Han in the China region excluding Yunnan, Guangxi and Guangdong post-Qing and post-Xinhai like in real life with former Qing general Yuan Shikai as its first President, but Shikai still dissolved the Republic and made the Beiyang Government into the Empire of China on 12 December 1915 like in real life, which lead to the  25 December 1915 – 14 July 1916 National Protection War between the Empire of China and Nationalist China like in real life and the subsequent 1916-1928 modern warlord era of post-Xinhai, post-Qing Chinese history after Shikai's death like in real life, but Zhang Zhuolin/Zuolin was able to coronate himself Emperor of China in 1926 like what Yuan Shikai did in 1915 and transform the Beiyang Government from the first Republic of China, albiet occupied by the Manchuria-based Fengtian Clique he ruled as military dictator from 1911-1926, into the Empire of China created by Yuan Shikai when the latter proclaimed himself Emperor of China in 1915 once more, but was still killed by the Soviets in 1928 with the assasination blamed on the Japanese, but his son, Zhang Xueliang was also killed with him, which allowed the Japanese to make Pu-Yi the leader of the Fengtian Clique, essentially making the Fengtian Clique a restored Qing Manchurian rump state and seperating the Fengtian Clique from the Beiyang Government as the Empire of China, with the descendants of the Ming dynasty's reigning imperial family, the Imperial House of Zhu becoming the restored Empire of China's reigning imperial family.