Road course · Japan
Okayama International Circuit
Okayama International Circuit is a road course in Japan. OpenStreetMap maps 4 layouts here, the longest 2.30 mi (3.69 km). Below: the map, every corner with a computed line, the elevation, and where to stay and eat.
- 3.70
- Kilometres
- 13
- Corners
- —
- Ft of elevation
01Track map
Okayama International Circuit track map
Full circuit
Name inferred by TRACK from the mapped loops, not an official layout name.
- Mapped length
- 2.30mi
- 3.69 km
- Direction
- Clockwise
- From OSM one-way tagging.
- Start/finish line
- Estimated
- Estimated by TRACK from the mapped geometry and not verified on site. TRACK asks you to confirm or move it before timing laps here, when you’re stopped.
- Published length (cross-check)
- 2.30 mi · mapped loop agrees within 3%
- Corners
- 13
- Inferred from curvature, not official turn numbers
- Sectors
- 3
- Estimated, near each third of the lap
Source geometry: OpenStreetMap ↗. Something wrong? Fixing it in OpenStreetMap improves it for everyone.
02Overview
What Okayama International Circuit is like to drive.
The full circuit layout at Okayama International Circuit is 2.30 miles with 13 corners worth setting up for. A generic track-day car in our model brakes hard 12 times a lap and is at full throttle for about 43% of the distance; the longest straight runs roughly 1411 ft.
5 of the corners are slow (under 50 mph in the model), 3 are fast (over 75 mph). There are hairpins where exit speed matters more than entry. The corner notes below come from the mapped geometry, not from local knowledge; we’ll add a researched guide for Okayama International Circuit later.
03Lap at a glance
Where the speed is, and where the hills are.
- Length
- 2.30mi
- Elevation range
- —
- Steepest grade
- —
- Braking zones
- 12model
- Full throttle
- 43% model
- Longest straight
- 1411ft
The speed trace is a model, not a real lap: a generic track-day car (about 1.1 g of cornering grip, 1 g braking, 150 W/kg) driven on the computed line through an assumed 12 m wide track. Use it to see where the braking zones and flat-out sections are, not to predict your speeds. Elevation data for this track isn’t loaded yet.
04Corner by corner
The corners at Okayama International Circuit.
TRACK’s own corner numbering (C1, C2…), found from the curvature of the mapped centerline. It isn’t the official turn numbering. Each diagram shows the computed line: the minimum-curvature path through an assumed 12 m wide track. It’s a geometric starting point. Your instructor’s line comes first.
- C1
岡山国際サーキット
↱ RightslowhairpinTRACK numbering
A slow right-hand hairpin that turns about 176°, tightening to a radius of roughly 18 m (59 ft). The model car brakes for about 190 m (623 ft), from 131 to 38 mph. The computed line turns in from the left side, takes a late apex, about 5 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 176° right
- Tightest radius
- 18 m
- Model speed
- 131 → 38 mph
- Braking (model)
- 190 m
- Grade
- —
- C2
岡山国際サーキット
↰ LeftslowcornerTRACK numbering
A slow left-hand corner that turns about 88°, tightening to a radius of roughly 20 m (66 ft). The model car barely brakes here, carrying about 38 mph: a lift or a confident throttle balance. The computed line turns in from the right side, takes an apex close to the geometric apex, and lets the car run out to the right on exit.
- Turns
- 88° left
- Tightest radius
- 20 m
- Model speed
- ≈ 38 mph
- Braking (model)
- Lift / none
- Grade
- —
- C3
岡山国際サーキット
↰ LeftmediumcornerTRACK numbering
A medium left-hand corner that turns about 104°, tightening to a radius of roughly 31 m (102 ft). The model car brakes for about 75 m (246 ft), from 75 to 52 mph. The computed line turns in from the right side, takes an apex close to the geometric apex, and lets the car run out to the right on exit.
- Turns
- 104° left
- Tightest radius
- 31 m
- Model speed
- 75 → 52 mph
- Braking (model)
- 75 m
- Grade
- —
- C4
岡山国際サーキット
↰ LeftslowhairpinTRACK numbering
A slow left-hand hairpin that turns about 155°, tightening to a radius of roughly 25 m (82 ft). The model car brakes for about 135 m (443 ft), from 99 to 42 mph. The computed line turns in from the right side, takes an early apex, about 10 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 155° left
- Tightest radius
- 25 m
- Model speed
- 99 → 42 mph
- Braking (model)
- 135 m
- Grade
- —
- C5
岡山国際サーキット
↱ RightslowhairpinTRACK numbering
A slow right-hand hairpin that turns about 163°, tightening to a radius of roughly 23 m (75 ft). The model car brakes for about 65 m (213 ft), from 65 to 40 mph. The computed line turns in from the left side, takes a late apex, about 5 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 163° right
- Tightest radius
- 23 m
- Model speed
- 65 → 40 mph
- Braking (model)
- 65 m
- Grade
- —
- C6
岡山国際サーキット
↱ RightmediumcornerTRACK numbering
A medium right-hand corner that turns about 64°, tightening to a radius of roughly 40 m (131 ft). The model car brakes for about 60 m (197 ft), from 87 to 67 mph. The computed line turns in from the left side, takes a late apex, about 15 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 64° right
- Tightest radius
- 40 m
- Model speed
- 87 → 67 mph
- Braking (model)
- 60 m
- Grade
- —
- C7
岡山国際サーキット
↱ RightmediumcornerTRACK numbering
A medium right-hand corner that turns about 104°, tightening to a radius of roughly 36 m (118 ft). The model car brakes for about 80 m (262 ft), from 87 to 54 mph. The computed line turns in from the left side, takes an early apex, about 20 m before the geometric apex, and lets the car run out to the left on exit.
- Turns
- 104° right
- Tightest radius
- 36 m
- Model speed
- 87 → 54 mph
- Braking (model)
- 80 m
- Grade
- —
- C8
岡山国際サーキット
↱ RightmediumchicaneTRACK numbering
A medium right-hand chicane that turns about 128°, tightening to a radius of roughly 29 m (95 ft). The model car brakes for about 175 m (574 ft), from 123 to 52 mph. The computed line turns in from the left side, takes a late apex, about 165 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 128° right
- Tightest radius
- 29 m
- Model speed
- 123 → 52 mph
- Braking (model)
- 175 m
- Grade
- —
- C9
岡山国際サーキット
↰ LeftmediumessesTRACK numbering
A medium left-hand esses that turns about 103°, tightening to a radius of roughly 31 m (102 ft). The model car brakes for about 70 m (230 ft), from 89 to 66 mph. The computed line turns in from the right side, takes a late apex, about 70 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 103° left
- Tightest radius
- 31 m
- Model speed
- 89 → 66 mph
- Braking (model)
- 70 m
- Grade
- —
- C10
岡山国際サーキット
↰ LeftfastessesTRACK numbering
A fast left-hand esses that turns about 33°, tightening to a radius of roughly 55 m (180 ft). The model car brakes for about 50 m (164 ft), from 99 to 89 mph. The computed line turns in from the right side, takes a late apex, about 5 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 33° left
- Tightest radius
- 55 m
- Model speed
- 99 → 89 mph
- Braking (model)
- 50 m
- Grade
- —
- C11
岡山国際サーキット
↱ RightfastessesTRACK numbering
A fast right-hand esses that turns about 30°, tightening to a radius of roughly 60 m (197 ft). The model car brakes for about 45 m (148 ft), from 96 to 83 mph. The computed line turns in from the left side, takes an apex close to the geometric apex, and lets the car run out to the left on exit.
- Turns
- 30° right
- Tightest radius
- 60 m
- Model speed
- 96 → 83 mph
- Braking (model)
- 45 m
- Grade
- —
- C12
岡山国際サーキット
↰ LeftfastkinkTRACK numbering
A fast left-hand kink that turns about 15°, tightening to a radius of roughly 109 m (358 ft). The model car brakes for about 45 m (148 ft), from 96 to 83 mph. The computed line turns in from the right side, takes a late apex, about 75 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 15° left
- Tightest radius
- 109 m
- Model speed
- 96 → 83 mph
- Braking (model)
- 45 m
- Grade
- —
- C13
岡山国際サーキット
↱ RightslowhairpinTRACK numbering
A slow right-hand hairpin that turns about 193°, tightening to a radius of roughly 24 m (79 ft). The model car brakes for about 115 m (377 ft), from 102 to 48 mph. The computed line turns in from the left side, takes an apex close to the geometric apex, and lets the car run out to the left on exit.
- Turns
- 193° right
- Tightest radius
- 24 m
- Model speed
- 102 → 48 mph
- Braking (model)
- 115 m
- Grade
- —
05Configurations
Every mapped loop at Okayama International Circuit.
TRACK finds each closed loop in the OpenStreetMap raceway network. Named layouts come from OSM circuit relations; the rest are named by length, and some may be combinations the venue never runs. Your first session confirms which one you drove.
Full circuit
2.30 mi3.69 kmClockwiseS/F EstimatedName inferred
Layout B · 3.7 km
2.27 mi3.65 kmClockwiseS/F EstimatedName inferred
Layout C · 2.0 km
1.21 mi1.96 kmClockwiseS/F EstimatedName inferred
Layout D · 1.9 km
1.18 mi1.91 kmClockwiseS/F EstimatedName inferred
06Time it with TRACK
Drive Okayama International Circuit. TRACK knows where you are.
No setup and no transponder. Start a session in the paddock and TRACK recognises Okayama International Circuit and the layout from your GPS trace, then times every lap and sector with a live delta to your best.
- 1DetectTRACK matches your first few hundred metres against every mapped layout at Okayama International Circuit, including shared pavement between configurations.
- 2Confirm the lineThe start/finish line here is estimated. When you’re stopped, TRACK shows it on the map: accept it or tap to move it. You’re never asked while driving.
- 3Laps, timed retroactivelyLaps you drove before confirming are timed from the recorded trace, so you don’t lose your first session.
- 4Go furtherSync a GoPro for video with telemetry and let TRACK Engineer point out where the time is. External 10–25 Hz GPS receivers for tighter sectors are awaiting hardware validation.
- Venue and layout detection is tested on simulated drives over real OpenStreetMap circuits, not yet in a real car. Compatible GPS receivers
07Plan your trip
Getting there, staying, eating.
Nearby places for Okayama International Circuit haven’t been loaded yet.
08Track days
Find an open track day at Okayama International Circuit.
TRACK doesn’t copy event listings. An on-page calendar will come with an organizer data partnership.
Before your first day here
09Nearby tracks
Closest mapped venues.
- Nakayama CircuitJapan · 9 mi away
- Bihoku Highland CircuitJapan · 35 mi away
- Asan CircuitJapan · 61 mi away
- Inagawa CircuitJapan · 62 mi away
Straight-line distance between venues. All 889 tracks
FAQ
Okayama International Circuit, answered.
How long is Okayama International Circuit?
OpenStreetMap maps 4 closed loops at Okayama International Circuit, from 1.18 mi to 2.30 mi (3.69 km). These are mapped centerline lengths; the venue’s published figures can differ slightly. The published length we cross-check against is 2.30 mi.
Which direction does Okayama International Circuit run?
The main mapped layout runs clockwise, from one-way tagging in OpenStreetMap. Check the event’s driver briefing: some venues run reverse-direction days.
Can I time laps at Okayama International Circuit with my phone?
Yes, with the TRACK iPhone app (beta). It recognises Okayama International Circuit and the layout you’re driving from GPS, then times laps and sectors. A phone’s GPS is good for lap times; an external 10–25 Hz receiver tightens sector splits.
Where is the start/finish line at Okayama International Circuit?
TRACK estimates the line from the mapped geometry (usually beside the pit lane, or on the longest straight). It isn’t verified on site, so the app asks you to confirm or move it before timing your first session here.
How do I find track days at Okayama International Circuit?
Clubs and organizers list HPDE, track days and club races on MotorsportReg. The venue’s own calendar (also linked) lists its events too. TRACK doesn’t list events itself.
Where can I stay near Okayama International Circuit?
This page lists hotels, campgrounds, restaurants, fuel and parts stores near Okayama International Circuit from OpenStreetMap, with straight-line distances. Book early for big event weekends.
Track geometry and nearby places: © OpenStreetMap contributors, available under the Open Database License 1.0 (via the TRACK Atlas, snapshot 2026-10-17). Elevation: USGS 3DEP (public domain). Lengths are mapped centerlines, not official figures. The computed line and speed trace are a model. No start/finish line has been verified on site.
TRACK is not affiliated with or endorsed by Okayama International Circuit, MotorsportReg or any business listed here. The venue name identifies the location only and belongs to its owner. TRACK shows no lap records or official results for this venue. Driving advice is general: your instructor, the event’s rules and the venue’s rules come first.