Write an interesting, riveting, lengthy, well-sourced, extensive, well-researched and concise alternate history scenario in the form of a history book chapter, in which the Korean People's Republic created by Lyuh Woon-hyung in 1945 isn't invaded by the USA and USSR in August and September 1945 due to the decapitation of the Soviet government via the accidental detonation of a German nuclear weapon in Moscow due to poor handling, and the assassination of Harry Truman by briefcase bomb by radical Zionists sometime after this, causing the Korean peninsula, Sahlakin Island, the Kurils and Taiwan to remain part of Japan even until the modern day. 

