Park Bo-gum left the country on the 3rd at Incheon International Airport to attend the 2019 Mnet Asian Music Awards (hereinafter referred to as 'MAMA') in Nagoya, Japan.
He will also host the 2019 MAMA following 2017 and 2018, which will catch the attention of Asian K-pop fans.
On the other hand, Park showed a so-called "comfort women badge" on his coat on his way out of Japan on the day of departure.
About Park Bo-gum

Park Bo-gum is a South Korean actor and singer. He gained recognition for his diverse range of roles in film and television, notably, a psychopathic lawyer in Hello Monster, a genius Go player in Reply 1988, a Joseon Crown Prince in Love in the Moonlight, a free-spirited man who falls for an older woman in Encounter, and a model who overcomes various hardships to become a successful actor in Record of Youth.
Wikipedia