Road course · Saitama, Japan
Honjo Circuit
Honjo Circuit is a road course in Saitama, Japan. OpenStreetMap maps one layout here, 0.66 mi (1.07 km). Below: the map, every corner with a computed line, the elevation, and where to stay and eat.
- 1.07
- Kilometres
- 8
- Corners
- —
- Ft of elevation
01Track map
Honjo track map
Full circuit
Name inferred by TRACK from the mapped loops, not an official layout name.
- Mapped length
- 0.66mi
- 1.07 km
- Direction
- Not mapped
- TRACK takes it from your first drive.
- 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
- 8
- Inferred from curvature, not official turn numbers
- Sectors
- 3
- Estimated, near each third of the lap
Data notes (1)
- Short loop (1071 m) — check it is not a kart or skid-pad circuit.
Source geometry: OpenStreetMap ↗. Something wrong? Fixing it in OpenStreetMap improves it for everyone.
02Overview
What Honjo is like to drive.
The full circuit layout at Honjo is 0.66 miles with 8 corners worth setting up for. A generic track-day car in our model brakes hard 7 times a lap and is at full throttle for about 25% of the distance; the longest straight runs roughly 344 ft.
7 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 Honjo later.
03Lap at a glance
Where the speed is, and where the hills are.
- Length
- 0.66mi
- Elevation range
- —
- Steepest grade
- —
- Braking zones
- 7model
- Full throttle
- 25% model
- Longest straight
- 344ft
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 Honjo.
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
Slow right-hander
↱ RightslowhairpinTRACK numbering
A slow right-hand hairpin that turns about 180°, tightening to a radius of roughly 16 m (52 ft). The model car brakes for about 115 m (377 ft), from 94 to 34 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
- 180° right
- Tightest radius
- 16 m
- Model speed
- 94 → 34 mph
- Braking (model)
- 115 m
- Grade
- —
- C2
Medium right-hander
↱ RightmediumchicaneTRACK numbering
A medium right-hand chicane that turns about 57°, tightening to a radius of roughly 23 m (75 ft). The model car barely brakes here, carrying about 50 mph: a lift or a confident throttle balance. The computed line turns in from the left side, takes a late apex, about 90 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 57° right
- Tightest radius
- 23 m
- Model speed
- ≈ 50 mph
- Braking (model)
- Lift / none
- Grade
- —
- C3
Slow left-hander
↰ LeftslowhairpinTRACK numbering
A slow left-hand hairpin that turns about 170°, tightening to a radius of roughly 11 m (36 ft). The model car brakes for about 110 m (361 ft), from 87 to 29 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
- 170° left
- Tightest radius
- 11 m
- Model speed
- 87 → 29 mph
- Braking (model)
- 110 m
- Grade
- —
- C4
Slow left-hander
↰ LeftslowchicaneTRACK numbering
A slow left-hand chicane that turns about 192°, tightening to a radius of roughly 11 m (36 ft). The model car brakes for about 110 m (361 ft), from 87 to 29 mph. The computed line turns in from the right side, takes an early apex, about 45 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 192° left
- Tightest radius
- 11 m
- Model speed
- 87 → 29 mph
- Braking (model)
- 110 m
- Grade
- —
- C5
Slow right-hander
↱ RightslowcornerTRACK numbering
A slow right-hand corner that turns about 83°, tightening to a radius of roughly 14 m (46 ft). The model car brakes for about 70 m (230 ft), from 75 to 32 mph. The computed line turns in from the left side, takes a late apex, about 55 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 83° right
- Tightest radius
- 14 m
- Model speed
- 75 → 32 mph
- Braking (model)
- 70 m
- Grade
- —
- C6
Slow right-hander
↱ RightslowchicaneTRACK numbering
A slow right-hand chicane that turns about 358°, tightening to a radius of roughly 14 m (46 ft). The model car brakes for about 70 m (230 ft), from 75 to 32 mph. The computed line turns in from the left side, takes an early apex, about 5 m before the geometric apex, and lets the car run out to the left on exit.
- Turns
- 358° right
- Tightest radius
- 14 m
- Model speed
- 75 → 32 mph
- Braking (model)
- 70 m
- Grade
- —
- C7
Slow left-hander
↰ LeftslowchicaneTRACK numbering
A slow left-hand chicane that turns about 163°, tightening to a radius of roughly 17 m (56 ft). The model car brakes for about 30 m (98 ft), from 58 to 47 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
- 163° left
- Tightest radius
- 17 m
- Model speed
- 58 → 47 mph
- Braking (model)
- 30 m
- Grade
- —
- C8
Slow right-hander
↱ RightslowhairpinTRACK numbering
A slow right-hand hairpin that turns about 156°, tightening to a radius of roughly 14 m (46 ft). The model car brakes for about 60 m (197 ft), from 68 to 34 mph. The computed line turns in from the left side, takes an early apex, about 5 m before the geometric apex, and lets the car run out to the left on exit.
- Turns
- 156° right
- Tightest radius
- 14 m
- Model speed
- 68 → 34 mph
- Braking (model)
- 60 m
- Grade
- —
05Time it with TRACK
Drive Honjo. TRACK knows where you are.
No setup and no transponder. Start a session in the paddock and TRACK recognises Honjo 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 Honjo, 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
06Plan your trip
Getting there, staying, eating.
Nearby places for Honjo haven’t been loaded yet.
07Track days
Find an open track day at Honjo.
TRACK doesn’t copy event listings. An on-page calendar will come with an organizer data partnership.
Before your first day here
08Nearby tracks
Closest mapped venues.
- Isesaki Auto Race TrackJapan · 12 mi away
- Kawaguchi Auto Race TrackJapan · 42 mi away
- Sportsland YamanashiYamanashi · 44 mi away
- Tsukuba CircuitJapan · 45 mi away
Straight-line distance between venues. All 917 tracks
FAQ
Honjo, answered.
How long is Honjo?
The mapped centerline of Honjo Circuit is 0.66 mi (1.07 km) in OpenStreetMap. Published lengths are measured differently, so small differences are normal.
Which direction does Honjo run?
OpenStreetMap doesn’t record a direction for the main layout at Honjo. Venues sometimes run both ways. TRACK takes the direction from your first laps.
Can I time laps at Honjo with my phone?
Yes, with the TRACK iPhone app (beta). It recognises Honjo 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 Honjo?
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 Honjo?
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 Honjo?
This page lists hotels, campgrounds, restaurants, fuel and parts stores near Honjo 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 2026-10-19). 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 Honjo 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.