5-minute average speeds and congestion levels on 1.9 million road links in 21 Japanese metro areas, aggregated from commercial fleet probes, with history since 2019.
Data product · Listing updated 11 Nov 2026
Japan
Real-time feed lag under 3 minutes
1.9 million road links in 21 metro areas
Startups, Mid-market, Enterprises, Public sector
Aggregated GPS probes from logistics and taxi fleet partners
Map matching to road links and 5-minute aggregation with a minimum of three vehicles per link-interval
Link-level traffic speeds for Japanese cities, built from commercial fleet probes and delivered only as aggregates.
Speeds come from GPS probes on logistics vans, trucks and taxis operated by partner fleets. Probe points are map-matched to road links and averaged per 5-minute interval. A link-interval is published only when at least three distinct vehicles contributed, and no vehicle identifiers, trips or traces leave Tsubame's processing environment. Coverage is densest in Tokyo, Osaka, Nagoya and Fukuoka; quieter links at night fall back to historical profiles and are flagged. History starts in 2019.
12 fields as documented by Tsubame Mobility Data.
| Field | Type | Description | Example |
|---|---|---|---|
| link_id | string | Road link identifier | — |
| road_name | string | Road name where known | — |
| road_class | string | expressway, national, arterial or local | — |
| city | string | Metro area | — |
| interval_start_jst | datetime | Start of the 5-minute interval (JST) | — |
| avg_speed_kmh | number | Average speed in the interval | — |
| free_flow_speed_kmh | number | Typical uncongested speed | — |
| travel_time_sec | number | Travel time across the link | — |
| congestion_level | integer | 0 (free flow) to 4 (standstill) | — |
| probe_count_band | string | 3-5, 6-10 or 11+ vehicles | — |
| source | string | live or historical_profile | — |
| incident_flag | boolean | True when a sudden slowdown is detected | — |
Real rows from the provider's sample file. Personal data is masked before anything is shown.
| link_idstring | road_namestring | road_classstring | citystring | interval_start_jststring | avg_speed_kmhstring | congestion_levelstring |
|---|---|---|---|---|---|---|
| L-130245 | Demo-dori Avenue | arterial | Osaka | 2026-11-02T08:15+09:00 | 18.4 | 3 |
| L-130246 | Demo-dori Avenue | arterial | Osaka | 2026-11-02T08:20+09:00 | 21.9 | 2 |
| L-884120 | Example Expressway Route 0 | expressway | Tokyo | 2026-11-02T08:15+09:00 | 64.0 | 1 |
Prices in USD, as published by Tsubame Mobility Data
real-time feed, one metro area
historical speed profiles, all metros
Converted amounts use DataStoa display rates and are approximate. Tsubame Mobility Data quotes the final price, taxes and terms.
Request detailed pricing1 country.
Time coverage: 2019 to present.
Provider-reported
Latency: Real-time feed lag under 3 minutes
DataStoa has not audited these figures. Ask the provider how they are measured, or test them on a sample.
The licence is agreed directly between you and Tsubame Mobility Data. This summary is provider-reported; the linked terms prevail.
Not listed: AI / ML model training, AI retrieval and grounding, redistribution allowed, marketing and outreach, research use. Ask Tsubame Mobility Data if you need any of these.
Japanese vehicle, traffic and EV charging data for mobility teams
Tsubame Mobility Data builds vehicle reference data, road traffic speeds and EV charging datasets for Japan, with charging coverage extending to South Korea. Parts suppliers, insurers and navigation developers use it to localise products for Japanese roads and vehicles.
Also available on: AWS Data Exchange