Road course · Japan
SPA Naoiri
SPA Naoiri is a road course in Japan. OpenStreetMap maps 2 layouts here, the longest 0.88 mi (1.42 km). Below: the map, every corner with a computed line, the elevation, and where to stay and eat.
- 1.43
- Kilometres
- 5
- Corners
- —
- Ft of elevation
01Track map
SPA Naoiri track map
Full circuit
Name inferred by TRACK from the mapped loops, not an official layout name.
- Mapped length
- 0.88mi
- 1.42 km
- Direction
- Counter-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.
- Corners
- 5
- 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 SPA Naoiri is like to drive.
The full circuit layout at SPA Naoiri is 0.89 miles with 5 corners worth setting up for. A generic track-day car in our model brakes hard 4 times a lap and is at full throttle for about 24% of the distance; the longest straight runs roughly 607 ft.
3 of the corners are slow (under 50 mph in the model), 0 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 SPA Naoiri later.
03Lap at a glance
Where the speed is, and where the hills are.
- Length
- 0.89mi
- Elevation range
- —
- Steepest grade
- —
- Braking zones
- 4model
- Full throttle
- 24% model
- Longest straight
- 607ft
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 SPA Naoiri.
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
SPA直入
↰ LeftslowhairpinTRACK numbering
A slow left-hand hairpin that turns about 204°, tightening to a radius of roughly 24 m (79 ft). The model car brakes for about 150 m (492 ft), from 114 to 49 mph. The computed line turns in from the right side, takes an early apex, about 5 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 204° left
- Tightest radius
- 24 m
- Model speed
- 114 → 49 mph
- Braking (model)
- 150 m
- Grade
- —
- C2
SPA直入
↱ RightmediumchicaneTRACK numbering
A medium right-hand chicane that turns about 139°, tightening to a radius of roughly 26 m (85 ft). The model car brakes for about 30 m (98 ft), from 67 to 56 mph. The computed line turns in from the left side, takes a late apex, about 105 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 139° right
- Tightest radius
- 26 m
- Model speed
- 67 → 56 mph
- Braking (model)
- 30 m
- Grade
- —
- C3
SPA直入
↰ LeftmediumessesTRACK numbering
A medium left-hand esses that turns about 83°, tightening to a radius of roughly 26 m (85 ft). The model car barely brakes here, carrying about 57 mph: a lift or a confident throttle balance. The computed line turns in from the right side, takes a late apex, about 140 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 83° left
- Tightest radius
- 26 m
- Model speed
- ≈ 57 mph
- Braking (model)
- Lift / none
- Grade
- —
- C4
SPA直入
↰ LeftslowchicaneTRACK numbering
A slow left-hand chicane that turns about 225°, tightening to a radius of roughly 15 m (49 ft). The model car brakes for about 45 m (148 ft), from 60 to 37 mph. The computed line turns in from the right side, takes a late apex, about 155 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 225° left
- Tightest radius
- 15 m
- Model speed
- 60 → 37 mph
- Braking (model)
- 45 m
- Grade
- —
- C5
SPA直入
↰ LeftslowhairpinTRACK numbering
A slow left-hand hairpin that turns about 287°, tightening to a radius of roughly 15 m (49 ft). The model car brakes for about 60 m (197 ft), from 60 to 36 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
- 287° left
- Tightest radius
- 15 m
- Model speed
- 60 → 36 mph
- Braking (model)
- 60 m
- Grade
- —
05Configurations
Every mapped loop at SPA Naoiri.
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
0.88 mi1.42 kmCounter-clockwiseS/F EstimatedName inferred
Layout B · 1.4 km
0.88 mi1.41 kmCounter-clockwiseS/F EstimatedName inferred
06Time it with TRACK
Drive SPA Naoiri. TRACK knows where you are.
No setup and no transponder. Start a session in the paddock and TRACK recognises SPA Naoiri 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 SPA Naoiri, 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 SPA Naoiri haven’t been loaded yet.
08Track days
Find an open track day at SPA Naoiri.
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.
- AutopolisJapan · 26 mi away
- Iizuka Auto RacetrackJapan · 55 mi away
- Sanyo Auto Race TrackJapan · 68 mi away
- Mine CircuitJapan · 74 mi away
Straight-line distance between venues. All 889 tracks
FAQ
SPA Naoiri, answered.
How long is SPA Naoiri?
OpenStreetMap maps 2 closed loops at SPA Naoiri, from 0.88 mi to 0.88 mi (1.42 km). These are mapped centerline lengths; the venue’s published figures can differ slightly.
Which direction does SPA Naoiri run?
The main mapped layout runs counter-clockwise, from one-way tagging in OpenStreetMap. Check the event’s driver briefing: some venues run reverse-direction days.
Can I time laps at SPA Naoiri with my phone?
Yes, with the TRACK iPhone app (beta). It recognises SPA Naoiri 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 SPA Naoiri?
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 SPA Naoiri?
Clubs and organizers list HPDE, track days and club races on MotorsportReg. The venue’s own calendar lists its events too. TRACK doesn’t list events itself.
Where can I stay near SPA Naoiri?
This page lists hotels, campgrounds, restaurants, fuel and parts stores near SPA Naoiri 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 SPA Naoiri, 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.