According to his close aides, Kanetane HIROHATA's diary, it is said the Emperor had a close relationship to the snake among the twelve animal signs of the (Chinese and Japanese) zodiac, not only was he born in the year of the snake, but he also died in the year of snake, the month, the date and the time of the snake.
ちなみに天皇の側近であった広幡兼胤の日記によれば、天皇は十二支の巳に縁があり、生年が巳年というだけでなく、崩御されたのが巳年巳月巳日巳刻であったという。