Super Junior discussed the upcoming enlistments of members Siwon, Donghae, and Eunhyuk during their performance at Japan's a-Nation summer concert series.

Super Junior's headliner concert for a-Nation was held on August 29 and attracted over 50,000 fans according to Japanese media outlet Oricon Style. 2015 marked Super Junior's third year participating in a-Nation, while their sub-unit group Donghae and Eunhyuk have participated in the concert series for four years in a row.

During the show, member Heechul greeted the fans and expressed the group's happiness for performing on the a-Nation stage. "This is one of our last performances with Siwon, Donghae, and Eunhyuk, and we are happy to be performing on such a big stage," Heechul said, as reported by OSEN.

Siwon, Donghae, and now Eunhyuk as well, will be fulfilling their mandatory military service soon. Although no official date has been released, Heechul's speech at a-Nation has prompted fans to believe they will enlist very soon.

Member Eunhyuk also greeted the large a-Nation audience that day. "I will never forget the great times we have had," he shared. Member Donghae also asked that the fans wait for them for the next two years.   

News of Siwon and Donghae's enlistment has circulated for a while since it was revealed earlier this year that both members passed the police conscription examination. They plan to enlist sometime this year.