On December 6, flumpool announced that it has gone on indefinite hiatus due to vocalist Ryuta Yamamura's medical condition.
Yamamura has been experiencing strain on his vocal chords since the band started its latest nationwide tour in September. The issue became acute following the December 3 concert. Doctors diagnosed the singer with functional voice disorder, forcing him to stop his activities and seek treatment.
flumpool's hiatus will begin immediately. It is not known how long treatment and recover for Yamamura's condition will take, but the band will not be active during this time.
"I don't know how many months I will keep you waiting, but I will become better as soon as possible, and I promise that one day we will come back to the stage," Yamamura said.
Yamamura has had problems with his vocal chords for several years. In June 2010, the singer underwent surgery to remove polyps from his vocal chords. Throat issues have occurred on and off since then.