Turn 1: Turn 1 (First Corner) A downhill right-hander immediately after the pit straight, separated from Turn 2 by a short straight added in the 1985 remodel, and one of Suzuka's great flashpoints: Ayrton Senna and Alain Prost collided here in the title-deciding 1990 race.
Turn 2: Turn 2 The left-hander paired with Turn 1 and separated from it by the short straight added in 1985, feeding the cars into the esses; no widely recognised proper name was found in the sources.
Turn 3: S Curves (Turn 3) The entry to Suzuka's famous snaking S Curves, a linked left-right sequence F1 calls the snaking 'S' Curves; Nigel Mansell crashed his Williams-Honda heavily in the esses in 1987 practice, could not start, and effectively handed the title to Nelson Piquet.
Turn 4: S Curves (Turn 4) The second corner of the flowing S Curves, where rhythm matters more than any single apex.
Turn 5: S Curves (Turn 5) The third corner of the S Curves as the sequence climbs through the esses.
Turn 6: S Curves (Turn 6) The final corner of the S Curves before the run to the Dunlop Curve; Honda's own guide treats the high-speed esses as running from Turn 3 through Turn 7, so where the S Curves end and Dunlop begins is described slightly differently across sources.
Turn 7: Dunlop Curve (Turn 7) An uphill left-hander at the top of the esses, named at Turn 7 in the sources; it was the site of Jules Bianchi's fatal 2014 crash, when he aquaplaned off and struck a recovery vehicle.
Turn 8: Degner Curve 1 (Turn 8) The first of the two Degner corners, named after the East German rider Ernst Degner, who crashed his factory Suzuki here during Suzuka's inaugural race meeting in 1962; originally one long curve, it was split into two in 1987 for safety.
Turn 9: Degner Curve 2 (Turn 9) The tight, gravel-lined second half of the split Degner complex; in the 1989 title decider Senna's nose cone, damaged in his chicane collision with Prost, detached completely going through the Degner bend, forcing him to pit.
Turn 10: The Hairpin (Turn 10) The very tight, near-180-degree right-hander before the back straight that Formula 1 calls the incident-attracting Hairpin; sources confirm the name and position but not explicitly the number, so its pairing with Turn 10 is an inference from the surrounding named corners.
Turn 11: Turn 11 A transitional corner connecting the Hairpin exit toward the back straight and the approach to Spoon Curve; no source ties a proper name or explicit number to it, so it is placed by elimination within the confirmed 18-turn layout.
Turn 12: Turn 12 The second transitional corner on the approach to Spoon Curve; like Turn 11 it carries no cited proper name and is placed by elimination within the 18-turn count.
Turn 13: Spoon Curve (Turn 13) The first apex of the long, double-apex left-hander confirmed as Turns 13 and 14 by Honda's guide; the first part of Spoon was made slightly slower in a 1984 change that expanded the run-off.
Turn 14: Spoon Curve (Turn 14) The second apex of Spoon Curve, where a clean, wide exit is critical before the long run down to 130R.
Turn 15: 130R (Turn 15) The iconic high-speed left confirmed as Turn 15 by both Honda and Wikipedia; after Allan McNish's high-speed crash in 2002 it was rebuilt for 2003 as a double-apex corner with an 85-metre then a 340-metre radius.
Turn 16: Casio Triangle Chicane (Turn 16) The first part of the tight chicane inserted in 1983 to slow the cars into the pit straight; on lap 47 of the 1989 race Senna's ambitious pass on Prost into the Casio chicane ended in a collision that decided the championship.
Turn 17: Casio Triangle Chicane (Turn 17) The second part of the chicane, confirmed as Turns 16 to 17 by Honda; Wikipedia notes it is known as the Hitachi Automotive Systems Chicane in the circuit's motorcycle configuration, while F1 coverage keeps the Casio Triangle name.
Turn 18: Turn 18 (final corner) The last corner before the pit straight, after the chicane; before the 1983 chicane was built this was a long final right-hander taken flat out at over 200 mph. No source found gives it a proper name, so it is described by position.