为庆祝FTISLAND成立10周年，专辑《UNITED SHADOWS》正式发布。该专辑收录了乐队的多首精选曲目，并记录了2017年6月2日在日本武道馆举行的最后一场演唱会。To celebrate the 10th anniversary of FTISLAND's formation, album"UNITED SHADOWS" was released and Arena Tours were held. This content includes the final concert held at Nippon Budokan on 2nd June, 2017.