Type 65, Kiha 65(Rokujugo) in Japanese, on the Kyudai Line from Oita to Kurume.
The line goes through the mountains in middle of Kyushu.
The 65 has a powerful diesel engine with 500 horsepower to go up the highland.
This is The Yufu Express at Amagase station in Kyushu. Yufu is named after Mt. Yufu in Oita Pref.