The management agency of Kishidan issued an apology Wednesday for the pop band appearing on TV in costume resembling uniforms of Adolf Hitler's Nazi SS.
The apology was in response to a protest by a Jewish human rights group.
"We deeply regret and apologize for the distress it has caused (the) Simon Wiesenthal Center and all concerned," Sony Music Artists Inc. said in a statement, adding the band "will never again use this costume and it will be disposed of immediately."
All six male band members also "deeply regret and apologize in this matter," the statement said, while noting "(wearing the garb) was not meant to carry any ideological meaning whatsoever."
"We have taken the words of advice from (the) Simon Wiesenthal Center very seriously . . . we sincerely apologize for the insensitive action," it said.
The Los Angeles-based center, which monitors anti-Semitic and racist activities, asked Monday for an apology over the costumes the band wore during an interview aired Feb. 23 on MTV Japan, saying it disrespects Holocaust victims.
Kishidan is known for often wearing Japanese school uniforms in the style of "bosozoku" motorcycle gangs.