Longest and highest: the Steel Dragon 2000 in the Nagashima Spaland park in Mie, an hour and a half's train journey west of Tokyo. Its one-and-a-half-mile-long waves of steel, peaking at around 320ft, take five-and-a-half minutes to travel and win the prize for endurance fans. Admission (day pass): adult 4,100 yen (£23.50), child over two 3,100 yen (£18); child under two 1,300 (£7.50); 00 81 594 45 11 11; www.jnto.go.jp