Services normally operate on weekends, Public holidays, and additional days, such as school holidays,[1] with two return workings (Aso Boy 101, 102, 103, 104) per day. The 53 km (33 mi) journey between Kumamoto and Miyaji takes approximately 1 hour 30 minutes.[2]
On certain dates in October to December 2011, the Aso Boy 101 and 104 services were extended to run between Hakata and Kumamoto as part of a destination campaign targeting Kumamoto, Miyazaki, and Kagoshima.[3]
^ abc"特急"あそぼーい！"用に大変身 キハ183系1000番台" [KiHa 183-1000 series transformed for use on "Aso Boy" limited express]. Japan Railfan Magazine. Vol. 51, no. 604. Japan: Kōyūsha Co., Ltd. August 2011. pp. 66–68.
^特急"あそぼーい！"，博多—熊本間で延長運転 [Aso Boy limited express extended to run between Hakata and Kumamoto]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 15 October 2011. Retrieved 20 December 2011.
^特急「あそぼーい！」 [Limited express "Aso Boy"]. JR Kyushu Train Guide (in Japanese). Japan: Kyushu Railway Company. Archived from the original on 5 October 2011. Retrieved 19 December 2011.
^観光特急"あそぼーい！"が営業運転を開始 ["Aso Boy" tourist train enters service]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 5 June 2011. Retrieved 21 September 2011.
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