I'm thinking about the POD. The POD is that Ito Hirobumi did not die at the hands of the Korean assassin that I forgot the name, and was severely wounded instead. Instead, he dies a natural death. Besides, the influence of pro-Korean Japanese societies and anti-expansionists is pervasive enough that the imperialists, even they succeeded in annexing Korea, decided to give Korea some equal status with the Japanese Empire. So It was renamed the Empire of Japan and Korea. In this case, the Meiji Emperor is the Emperor of Japan-Korea as a whole. The last Korean emperor, Sunjong, became the King of Korea, while Meiji becomes the king of Yamato, in tribute to the old Japanese state.
Is it good enough? How about the world in this timeline?