The women's team, consisting of Bo Bae Ki, Lee Sung-jin and Choi Hyeonju, top the standings after shooting a combined 216-arrow score of 1993.
Ki, the world number two, and Lee, the number 28, were tied at the top of the individual standings with 671 from a maximum 720.
They were joined at the head of the scoring by Tan Ya-ting of Chinese Taipei, who also recorded 671, leaving the top three places to be determined by the number of 'inner 10s' scored by each athlete.
Ki came out top, followed by Lee and Tan.
The world's top-ranked women's archer, India's Deepika Kumari, had to settle for eighth place in the rankings, while world number three Yuting Fang was way back in 25th.
The USA, late qualifiers for the Games, had a good day, finishing second in the team rankings.
Khatuna Lorig was fourth overall with 669, with Miranda Leek (656) and Jennifer Nichols (654) bringing the team total to 1979.
Chinese Taipei were ranked third overall with a combined score of 1976, with Mexico's 1974 good enough for fourth.
The top four teams all receive a bye to the quarter-finals of Sunday's elimination phase.
The first knockout round sees India play Denmark, Japan up against Ukraine, Host Nation Great Britain against Russia and China against Italy.
All but six archers broke 600 on the day, with Iraq's Rand Al-Mashhadani the back marker on 498.
After the team medals are decided on Sunday, the individual knockout begins on Monday with the round of 64. The finals then take place on Thursday.