Some more stuff from my head canon.
Matt Smith in his 2018 performance as resistance leader Charles Manson in the film "Charlie Says". Charles Manson was a controversial figure among the American Resistance. Losing his mother to the Japanese invasion of the West Coast and having to fend for himself had somewhat unhinged Charles, who made a 'family' of resistance fighters in the early 1950s. His band grew to include over a thousand members who engaged in activities from the bombing of checkpoints to assassination. On occasion, he would give mind altering substances to captured IJA soldiers and colonists, explaining this as a means of helping them expand their perceptions beyond the strict social hierarchy that ruled their lives. Despite his desire to see the Japanese driven from the Pacific States, Charlie still adhered to some elements of eastern philosophy and was known to frequently sleep with the women under his command. His concept of 'Helter Skelter' proclaimed not only the need for the expulsion of fascist influence from the former United States but the rejection of the social norms that fascist rule demanded.
During the Japanese withdrawal from the Pacific States, Charlie would take to the airwaves at a radio station in Salt Lake City. During his broadcasts, he would encourage young people in the American Reich and Confederate States to break free from the expectations placed upon them. Fellow resistance leader Thomas Smith would later say in an interview with a Canadian reporter "the guy had ideas, sure, but when I talked with him I'd sometimes ask myself if his brain was two planets away from the rest of him."
Resistance leader Thomas Smith during his time in the Hitler Youth, 1960. Thomas was a firm believer in the Reich's principles until the rape of his sister Jennifer by Sean Monkford, a young rising star in the British Union of Fascists who was visiting New York at the time. His sister's trauma and the manner in which her assault was brushed under the rug caused Thomas to rapidly turn against the American Reich. He aided resistance fighters in a number of operations, from the assassination of Monkford to the bombing of the New York Metropolitan Opera House where Helmut Goebbels was attending a performance. He left the American Reich after two years of these activities and was in the Pacific States when the Japanese were forced to effect a hasty withdrawal.
Wreckage from the 1963 Nagoya earthquake and tsunami. While the immediate effects of the disaster devastated the city, what happened soon later set into motion the chain reaction that led to the fall of not just the Japanese Empire but the Fascist bloc as well. A laboratory belonging to Unit 731 where a waterborne pathogen was being developed for possible use in China was breached and the pathogen entered the floodwaters that moved further inland, contaminating the water table of towns close to Tokyo and infected the residents.
The Japanese government was caught off guard by the sudden pandemic and despite the efforts to keep the news under wraps, reports reached Japan's client states which prompted a massive increase of insurgent activity. Slave workers in China allied themselves with sympathetic soldiers of the puppet army and engaged in a revolution. The administration in Indonesia collapse and cut off Japan's oil supply in the South Pacific with the support of Australia and New Zealand. These upheavals encouraged resistance fighters in the Pacific States to cut off Japanese access to Alaskan oil while attacking every target of opportunity. These upheavals led to Japan's empire falling piece by piece.