From Kagoshima-Chuo train to Kumamoto, train to Aso, then taxi to Aso-san. 3 h 25 min ¥12333. From Kagoshima-Chuo train to Kumamoto, bus to Aso, then bus to Asosan Nishi. 5 h 22 min. From Kagoshima drive to Aso-san. 2 h 49 min ¥3111.
Train from Kagoshima to Aso-san
Japan Railways Shinkansen operates a train from Kagoshima to Aso-san hourly. Tickets cost $35 - $55 and the journey takes 56 min. JR Kyushu Railway Company also services this route every 2 hours.