Services are operated by 6-car 800 Series sets, with a maximum speed of 260 kilometres per hour (160 mph).[11] The trains were developed by Hitachi, and based on the 700 series trains already in service on the Tokaido/Sanyo Shinkansen line.
Individual trains are named Tsubame ("Swallow"), the name of the former Hakata-Kagoshima limited express service. 8-car N700-7000 and N700-8000 series trains are used on through-running services between Shin-Osaka and Kagoshima-Chūō. The first set (S1) was delivered to Hakata Depot in October 2008.[12]
Three services operate on the line, in order of speed: Mizuho, Sakura, and Tsubame. The Mizuho makes two return trips between Shin-Osaka and Kagoshima-Chūō during the morning hours, and two return trips during the evening, with an end-to-end journey time of 3 hours 45 minutes. Sakura services run once per hour throughout the day between Shin-Osaka and Kagoshima-Chūō making additional stops, with an end-to-end travel time of 4 hours 10 minutes. There are also one to two Sakura services every hour between Hakata and either Kumamoto or Kagoshima-Chūō. Tsubame trains operate the all-stations service between Hakata and Kumamoto 1-2 times per hour, with some services operating to/from Kagoshima-Chūō.