Write an realistic, plausible alternate history scenario set on the world of the alternate history scenario with no references to the real world, OTL, or even to the fact that this is an alternate history scenario after all in the form of a lengthy, descrptive, exposition-filled real documentary history book chapter set in the world of the alternate history scenario, in which Japan, which [Japan] continued on its [Japan’s] post-WW2 growth towards [Japan] becoming a political, economic, military and cultural superpower [Japan], [Japan] never experiencing “the Lost Decade” and or the Plaza Accords or any slump in growth and development in the late 1990s and 2010s, [Japan] has Taiwan and the Pengu Islands returned to it [Japan] as a province [of Japan] in a repeat of the return of Okinawa in 1972 to Japanese control due to the Han nationalist, Han supremacist, Chinese nationalist, Chinese imperialist, Marxist-Stalinist political party/militant group/secret society of the KMT/Kuomingtang and the joint American-Soviet satellite state the KMT ruled with an iron fist, the Unitary, adhering to Sun Yat Sen's three principles of the people, nationalism, democracy and socialism [social welfare] one-party ruled and dominated directorial republic under a military dictatorship of the Second Republic of China/Nationalist China/National Government of the Republic of China which [Nationalist China] had [Nationalist China] been in exile on Taiwan in 1949 after the latter [the KMT and Nationalist China] lost the Chinese Civil War of 1947-1949 to the de jure Marxist-Leninist, socialist but de facto Han nationalist, Han supremacist, Chinese supremacist, Chinese Imperialist Chinese Communist Party ruled de jure socialist republic but de facto Han nationalist, Han supremacist People's Republic of China ruling [the PRC] over Han China, Guangdong, Guangxi, East Turkestan, Inner and Outer Mongolia, Tibet, Shanxi and Yunnan from [the PRC's stronghold and home base] Greater Manchuria, [Nationalist China] reunifying with the mainland after the death of the KMT's most infamous head, Nationalist China's most infamous Chairman and Generalissmo and Soviet dictator Josef Stalin's man in China, the Han Chinese revolutionary turned warlord  Jiǎng Jièshí, who [ Jièshí] was [ Jièshí] better known as "Chiang Kai Shek" in [when [ Jièshí/"Kai Shek" died]  5 April 1975 and the death of the CCP's most infamous head and the first fascist dictator of the PRC, Mao Zedong in [when Zedong died] September 9, 1976.

with Japan subsequently restoring the Japanese province on Formosa on Taiwan and the Pengu Islands after their [Taiwan and the Pengu Island's] return to Japanese control. 

In order to get money to prop up the failing Soviet economy and also as a unimplied non-aggression treaty, the Soviets also return Sahlakin and the Kurils to Japan, with the Japanese subsequently restoring the post-WW1, pre-1920s Japanese province of Karufuto on Sahlakin and the Kuril Islands. 

After pro-democracy, anti-military dictatorship protests in the joint US-PRC puppet state of the totalitarian military dictatorship of the Republic of Korea occupying South Korea spread to the Soviet satellite dictatorship of the Korean nationalist, Korean supremacist, Leninist-Stalinist Worker's Party of Korea-ruled totalitarian communist dictatorship of the Democratic People's Republic of Korea occupying North Korea, [the protests in the ROK spreading to the DPRK] toppling both post-WW2 Korean regimes [the DPRK and ROK], the Soviets and Americans jointly agree to return all of the Korean peninsula to Japan in a repeat of the Taiwanese and Okinawan situations.

After the return of the entire Korean peninsula to Japan, the Japanese restore the pre-1947 Japanese province of  Chōsen on the Korean peninsula. 

 The 15 April 1989 – 4 June 1989 Tiananmen Square anti-CCP protests with the goal of End of corruption within the Chinese Communist Party, as well as democratic reforms, freedom of the press, freedom of speech, freedom of association, social equality, democratic input on economic reforms and the subsequent massacre conducted by the mainland Chinese military and police forces in Beijing in mainland China still occurs but [the Tiananmen Square anti-CCP protests] spread farther and deeper across mainland China, [the  Tiananmen Square anti-CCP protests] becoming a militant revolution against the mainland Chinese regime and both the CCP and KMT, [the Tiananmen Square anti-CCP protests] becoming a repeat of the 10 October 1911 – 12 February 1912 Xinhai Revolution against the Manchu Imperial House of Aisin Gioro-ruled, Manchu-dominated imperial absolute dynastic federalist royal monarchy of the Great Qing Empire ruling [the Great Qing Empire] over Han China, Guangdong, Guangxi, Yunnan, East Turkestan, Tibet, Inner and Outer Mongolia and Tuva from [the Great Qing Empire's stronghold] Inner and Outer Manchuria, [the Xinhai Revolution] launched [the Xinhai Revolution] by [who launched the Xinhai Revolution] the Han Nationalist, Han supremacist and Han expansionist secret society/political organization/militant group of the Tongmenghui, Han nationalists and Han monarchists along with unassociated Cantonese independence groups [the Tiananmen Square protests becoming a modern day version of the Xinhai Revolution] with the CCP taking the place of the Imperial House of Aisin-Gioro and the PRC taking the place of the Great Qing Empire in this modern incarnation of the inhai Revolution, and [the Tiananmen Square protests] leads to the fall of the PRC and the subsequent breakaway of Guangdong, Guangxi, East Turkestan, Manchuria, Inner and Outer Mongolia, Tibet, Shanxi and Yunnan from Han China, and the subsequent restoration of the Beiyang Government-ruled first Republic of China as the short-lived Empire of China formed by Yuan Shikai in 1915, with the imperial family of the pre Qing Han Chinese Imperial House of Zhu-ruled Great Ming State/Great Ming Empire/"Ming dynasty", the Imperial House of Zhu being [the Imperial House of Zhu] reenthroned [the Imperial House of Zhu] as the Chinese imperial family in the place of Yuan Shikai's descendants due to the influence of the millenianist Chinese folk religious sect focused on militant self-defense and tax resistance along with romanticised monarchism, wishing to restore the pre Qing Han Chinese Imperial House of Zhu-ruled Great Ming State/Great Ming Empire/"Ming dynasty" as the government of China, the Yellow Sand Society, which [the Yellow Sand Society] was [the Yellow Sand Society] never suppressed [the Yellow Sand Society] by the CCP in 1980, [the influence of the Yellow Sand Society] being  [the influence of the Yellow Sand Society] quite prevalent  [the influence of the Yellow Sand Society] in  post CCP, post-PRC Han China.