Take the JR Gakken Toshi line to Hosono Station, or the Kintetsu Kyoto Line to Shin-Hosono station. Then catch the Nara Kotsu Bus Hikari-dai Jutaku line and get off at NTT Keihanna or Hikaridai 2-chome (15 minutes).
From Osaka, take the Kintetsu Nara Line to Gakuen-mae station. From there a taxi takes 20 minutes.
From Kyoto, take the Kintetsu Kyoto Line to Takanohara, from there a taxi takes 10 minutes.