Vocal group 4Men ended their first concert in Japan successfully. The group participated in the 'K-POP Big Four Seasons Tokyo Charity Festival' on the 20th KST. 4Men is reported to have been the only "vocal group" to perform in the event, singing hit singles like "I Can't", "Once in a Lifetime," "Hello", and "Reason" from the 'Secret Garden' OST. The members also spread some holiday cheer with their rendition of "Silent Night Holy Night". Labelmate Dal Shabet also performed their own hits like "Bling Bling", "Pink Rocket", and "Supa Dupa Diva". Agency Happy Face Entertainment stated after the concert ended, "4Men was the only vocal group invited, and as it was the first time since debut that they've knocked on the door to the Japanese market, it was quite meaningful. Dal Shabet was also the only girl group invited, which helped confirm their potential for a venture into Japan." In further news, 4men will be participating in the 'Crazy Soul - If You Aren't Crazy' concert with Vibe and Lee Young Hyun on December 24th and 25th. Source + Photo: Osen