"As I've been branded as a "national traitor", I can not stand the fact that I'm harming others for my own sake", he added. He is one of five people to make up Big Bang, who are considered showbusiness royalty in the country and many other parts of the world.
But its members have often been in the limelight for misconduct.
Another member, rapper T.O.P, was handed a 10-month suspended prison sentence for marijuana use in 2017.
He also thanked all the fans for their support for the past 10 years.
A petition surfaced last week calling for him to step aside after causing "unrecoverable damage to the group's reputation".
"I give my heartfelt, honest thanks to fans at home and overseas who gave their love for the past 10 years", he continued.
Another user added: "He was my favourite among all BIGBANG members but he must be punished for what he has done wrong".
Apple to announce Netflix rival later this month
Apple is said to charge $10 to its consumers for the premium news subscription services. The company pitched the event on Monday with the tagline "It's show time".
I would like to apologize one more time.
The club-goer claimed he saw a woman being sexually harassed and asked for security guards to help.
'They talk like they are talking about food or something. He also said he had been branded a "traitor to the nation", according to a Reuters report.
Stocks of talent agencies took a plunge Monday after Yonhap News named Seungri, nicknamed "Korea's Great Gatsby" for his opulent lifestyle, as a suspect in the probe involving prostitutes at clubs in the Gangnam area in Seoul.
Big Bang's Seungri announced on Monday, March 11 that he was retiring from the entertainment industry.
It is alleged that Seungri tried to obtain prostitutes for clients through a group chat on the messaging app KakaoTalk in 2015.
The Burning Sun closed in early March.
In the meantime, the military has said that Seungri's enlistment will not be postponed and he can continue to cooperate with the investigation during his service.