CNN  —  When the Japanese artist Shimabuku was 31 years old, he took an octopus on a tour of Tokyo. After catching it from the sea with the help of a local fisherman in Akashi, a coastal city over 3 hours away from the Japanese capital by train, he transported the live creature in a temperature-controlled tank of seawater to show it the sights of Tokyo before returning it safely to its home the same day. “I thought it would be nice,” the artist, now 56, said about the experience, over a video