A yellow t-shirt with black text reads, "It thinks that 'Think about a wave.' surfers will decrease due to the development of the very useful thing of the wave information. Think that the surfer who can predict a wave by itself is a'surfer' from the information such as a weather map and a tide tide table. As for the surfing, the big nature of the sea is companion's sport. It is very important to have knowledge about the wave and the weather therefore for the surfer."