Mount Fuji is an attractive volcanic cone and a frequent subject of Japanese art especially after 1600, when Edo (now Tokyo) became the capital and people saw the mountain while traveling on the Tōkaidō road. According to the historian H. Byron Earhart, "in medieval times it eventually came to be seen by Japanese as the “number one” mountain of the known world of the three countries of India, China, and Japan". The mountain is mentioned in Japanese literature throughout the ages and is the subject of many poems.