With his sensitive perspective as one of outsiders, he has been photographing of every day life in underground communities by integrating himself into their life by living and hanging out with them, traveling various cities such as a squat in Milano and punks in South East Asia. Tsugi no your e, On to the next night in English, is the title of his first self-published monograph came out in 2013, a record of the days he spent with friends, punks, skaters, and girlfriends, met in Osaka where he finally reached after wandering around Japan in 2010.　 Yamatani's work is inspired by such photographers as Ryan McGinley, Larry Clark, Jacob Holdt and portrays youth in its timeless and universal shape. Yamatani states about his works that "The importance of information, place, and relationship were lost and all things are tend to be uniformed in this time of the world. It may be my job to record the chaos and reality that still exist in street and underground."