Ten years have passed since Mikurajima Island, with only one village with a population of 280 people, leapt to fame due to its dolphin watching. However, when I consider why, of all the numerous Izu islands, there are dolphins only at Mikurajima Island, I feel it is time to reconsider the state of dolphin watching, which to this point has been conducted only for humans' one-sided reasons, such as "Because we like them" and "Because we are healed by them".