Write an interesting, lengthy and plausible alternate history scenario in the form of a history book chapter, in which Japan exploits the chaos and tension in the Korean republics and Taiwan after the fall of the military dictatorship in South Korea and the end of the Chiangs in Taiwan to restore the Korean People's Republic founded by NAME_1 in 1945 as the government of a united Korean peninsula, and the Kingdom of Tungning ruled by the Zheng dynasty as the rightful regime of Taiwan, sometime before the Berlin Wall. This of course makes Korea and Taiwan de-facto Japanese prefectures, and pro-mainland Chinese loyalists and activists in Taiwan and NAME_2 dynasty loyalists, yangban remnants, Korean nationalists and chaebols and their supporters along with NAME_3 family supporters and pro-Soviet elements in both the former DPRK and Taiwan are either eliminated in a series of purges, deported to the PRC, or leave willingly for the USSR, USA and the British Commonwealth. Japan also reclaims the Kurils and Sahlakin Island from the Russians as prefectures of the Japanese state. 