Get on the train, Kashihara bound, on the Kintetsu Kyoto Line, and get off the train at Shin-Hosono Station.
Get on the Nara Kotsu bus, Gakken Nara Tomigaoka Station bound, and get off the bus at Kokuritsu Kokkai Toshokan mae (in front of the National Diet Library) and walk 5 minutes from the bus stop.