Luna Sea held a special concert at the Nippon Budokan on May 29, 2017 where Sugizo's guitar was powered only by hydrogen fuel cells, making it the first concert in history to be powered as such. They then headlined at the Summer Sonic Shanghai 2017 festival on August 26. The band's ninth studio album "Luv" was released on December 20. The equipment of all five members was powered by hydrogen fuel cells for their December 23 and 24 concerts at the Saitama Super Arena. The eighteen-date Luv Tour -World Left Behind- was set to begin with two concerts on January 27 and 28, 2018 at Mori no Hall 21 in Chiba, but these two concerts were rescheduled to May 23 and 24 due to Sugizo having the flu. Instead the tour began on February 3. The band hosted another two-day Lunatic Fest at Makuhari Messe on June 23 and 24, 2018. Performers who were not at the 2015 festival include Glim Spanky, lynch., Maki Ohguro, and The Oral Cigarettes.