Member Jay of the 2-membered rock band TRAX officially entered the military on March 26th.

The rocker (real name Kim Young-duck, aged 29) checked into the training center in Busan to start his four weeks of training before starting his mandatory 23-month service.

In attempts to quietly sign up for his duties without causing a big media buzz, Jay hadn't even made the announcement to his fans. However, he had made mention of it last November while promoting for TRAX's third mini-album "Window", saying he would eventually go off to the military early 2012. Due to poor vision, he had been categorized in level four reserves, meaning he'll serve his sentence as a public service worker.

According to a phone interview with Star News, Jay said that he had spent some time off with his family and friends after wrapping up work for the drama "Women Of Our House". He was hoping to fulfill his compulsory military duties quietly and diligently.

There are rumors that Jay has recorded a song for the soundtrack of the drama "God of War", set to be released some time during his sentence.