You take the Ltd. Express trains bound for Namba (south part of Osaka) at Kintesu Nagoya station (every half past o'clock, i.e. 6:30, 7:30, ...), it will stop at Yamato-Yagi station.
Change train toward Saidaiji. Ltd. Express train bound for Kyoto is a good connection (within a few min.).
It takes only 5min. between Saidaiji and Kintetsu Nara station.