Before he became the monarch, his personal name (imina) was Tsunehito-shinnō (恒仁親王).[3] The posthumous name of Kameyama comes from the place name of the emperor's tomb, in a section of Kyoto.
1268 (Bun'ei 5): Kameyama did not answer a letter from Kublai Khan which demanded tribute. Khan, the leader of China, saw this non-response as rude and not respectful.[4]
1274 (Bun'ei 11, 1st month): In the 15th year of Kameyama's reign, he abdicated.[8]
19 November 1274 (Bun'ei 11, 20th day of the 10th month): Yuan China (Kublai Khan) sent a fleet and an army to invade Japan. Some military forces landed near Fukuoka in Kyūshū. This was the "Battle of Bun'ei" or the 1st Mongol Invasion. The same day, a storm sank many of the ships with the main part of the invading army. The invaders ran away to Korea.[9] During the short fight, the Hakozaki Shrine was burned to the ground.[10]
1281 (Kōan 4): This is called the "Battle of Kōan" or the 2nd Mongol Invasion. A typhoon broke up the invading fleet; and this act of 'divine wind' was called kamekaze.