Dodonpa at Fuji-Q Highland in Yamanashi Prefecture, Japan, costs ¥1,200 per ride (approximately $11 USD at current exchange rates). This is separate from park admission (¥6,000 adult day pass).
Dodonpa held the world acceleration record from its 2001 opening until 2017 (surpassed by Formula Rossa at Ferrari World). It remains a bucket-list coaster for enthusiasts. Fuji-Q also features Fujiyama, Eejanaika, and Takabisha—making it one of the world's most intense coaster collections.
¥1,200 for 1.8 seconds to 172 km/h: arguably the best adrenaline-per-yen ratio on Earth.