Last year, action drama IRIS was an overwhelming success in Korea with viewership consistently in the 30% range. TBS, one of Japan's largest TV stations paid millions for the rights to broadcast the drama in Japan and it seems it's been paying off as IRIS is enjoying success in the ratings department. Because of this success, the folks behind IRIS have organized various concerts in Japan and a concert took place on June 1st at the Saitama Super Arena in Saitama, Japan. There was actually two concerts held on June 1st, one in the afternoon and another in the evening. Both events attracted around 28,000 fans and the main cast of IRIS, along with Big Bang were in attendance. They played back songs from the IRIS OST and Big Bang performed their Japanese track for IRIS, Tell Me Goodbye. In addition, Big Bang performed their track for the Korean IRIS OST in Hallelujah. As a bonus, they also gave a special performance of their Japanese hit single Gara Gara Go. Check out some of the photos and fan cams below. [gallery]