Yamatoji Rapid Service is the fastest local train that is operated between Osaka (=大阪) and Nara (=奈良). Most of local tourists take Kintetsu line (近鉄) to Nara. Because they have many more trains and very frequent. If you travel in Japan without Japan Rail Pass, you may use Kintetsu line. But most of travellers from foreign countries use Japan Rail Pass. So this Rapid Service is your best choice, because you don’t need to pay any extra by Japan Rail Pass. This line used to be very local and inconvenient. But JR West upgrade the trains and operate many Rapid trains. It is very convenient and frequent departure these days.
And there is no limited express train to Nara. So this Yamatoji Rapid Service is the fastest and best choice for accessing from Osaka.
These trains connect downtown Osaka (=大阪) with Kansai airport (=関西空港) and Wakayama (=和歌山). Both Kansai Airport and Kishuji Rapid Services are combined to operate between Tennoji (=天王寺) and Hineno (=日根野). Those trains are uncoupled at Hineno, then each trains go to Kansai Airport or Wakayama. If you arrive at Kansai airport, you can take Kansai Airport Rapid Service instead of airport access express “Haruka“. Of course both Limited Express Haruka and this rapid train are fully covered by Japan Rail Pass. But if you buy a single ticket, you may consider to take this train.