2013 and in the first group stage he was pitted against Harstem, Dayshi, and LiveZerg, of which TaeJa defeated LiveZerg and Harstem 3-1 and 3-0 respectively. In Group Stage 2, TaeJa was put in Group A, which consisted of players HyuN, teammate TLO, and Bischu. TaeJa won 3-1 against TLO, and 3-2 against HyuN and consequently made it into the round of 8. There, TaeJa faced the American Zerg Goswser, whom he 3-1'ed to make it to the round of 4, in which TaeJa faced Alicia. He would ended up defeating Alicia 3-2 in a close series, and this put TaeJa into the finals where he faced San, a Protoss player formerly of New Star HoSeo, now playing for AZUBU. In the finals, TaeJa showed he was superior2013 WCS Season Finals, where he was placed in Group C with NaNiwa, duckdeok and INnoVation. First, he had to play INnoVation in a great TvT series. After he lost Game 1, he was able to pull off a comeback and win the series 2-1. In the winner's match, his opponent was duckdeok, who got defeated 2-0 by TaeJa. In the first round of Playoffs, he swept Rain 3-0, showing superb Ghost micro. In the Semifinals, he lost 2-3 against Bomber in quite a close series. This was his second consecutive 2-3 elimination in Semifinals against a Terran player.

In September, he attended 2013 DreamHack Open: Bucharest, which was arguably the most stacked DreamHack, and was placed in the second Group Stage into Group C with SjoW, Welmu and