Gearing up for their upcoming concert extravaganza at the Tokyo Dome, boy group JYJ recently shared some behind-the-scenes pictures of the immense amount of practice that goes into holding an event at one of the largest concert venues in the world.

According to a representative, the boys of JYJ are going through 10 hours of hard practice per day to prepare for the upcoming performances.

Their Tokyo Dome concert, entitled "The Return of the JYJ", will be held on April 2nd and 3rd and will mark their return to this venue for the first time in three years.

There are also reports that Yoochun will be revealing a new song at the concerts.

Source: X Sports News via Nate