Japanese scholar Miya Noriko presumes that the year 1402 was a landmark for the reigning King Taejong of the newly founded Joseon Dynasty. After a bloody succession struggle, Taejong ascended to the throne in 1400. In 1401, he was officially recognized as King of Joseon by the Chinese Emperor for the first time in the dynasty's history. In the 6th month of 1402, Yi Hoe's map of Korea was offered in a ceremony to celebrate his birthday. Then the project to combine it with Chinese and Japanese maps reportedly started in the summer (4th–6th months). This would be of symbolic significance in demonstrating royal power. This hypothesis also explains the factual error about the map of Japan. It was during the reigns of Taejo (1st king) and Jeongjong (2nd) that the map was obtained in Japan, but the date was altered to Taejong's reign.