Suzuka includes some of the F1 calendar’s most challenging corners. Among the drivers’ favourites are the high-speed 130R and the famous Spoon Curve. On top of this the circuit’s figure-of-eight layout makes it unique in F1 racing.
From TrackPedia :
Suzuka is one of the oldest remaining tracks on the Grand Prix circuit, and so has a long history of exciting races. Japan’s traditional role as the penultimate or final Grand Prix of the season means numerous World Championships have been decided at the track.
Safety has been a concern at the circuit’s 130R, a 130-meter radius turn starting past the Crossover, following two tremendous accidents in 2002 and 2003. In 2002, Toyota driver Allan McNish suffered a high-speed crash through the bump, which sent him through a metal fence; fortunately, he was not seriously injured.
Track officials revised the 130R, which has been compared to Spa’s Eau Rouge, redesigning it as a double-apex section, one with an 85 meter radius, and then a second featuring a 340-meter radius, leading to a much closer Casio Triangle (chicane), with the chicane becoming a “bus stop” type for motorcycles.