Gunma Prefecture is testing a new way to bring visitors to one of Japan’s oldest hot-spring destinations, using taxi rooftop screens in two regional cities and a beacon network in the onsen town itself. The project, commissioned by Gunma Prefecture and operated by Nakanojo Town with the Shima Onsen Association and taxi operator Nihon Chuo Kotsu, began distributing advertising on November 5, 2026, and is scheduled to run until December 31. Essen Inc. is the contractor.
The media plan is deliberately modest in scale and precise in targeting. Taxis operating mainly in Takasaki and Maebashi carry rooftop signage that displays Shima Onsen advertising while the vehicles run their normal fares. The creative, produced with Nakanojo Town and the Shima Onsen Association, uses a photograph of the blue surface of Ao-Shima Lake — known locally as “Shima Blue” — paired with the Shima Onsen logo. Text is kept to a minimum so the image reads from a distance while the taxi is moving.
The second element is measurement. Around 25 beacons are being installed across the Shima Onsen area to capture movement routes and dwell patterns, with locations chosen in coordination with the Shima Onsen Association and adjusted for mountainous conditions including rain and snow. The result is a rare attempt to connect an urban advertising exposure to physical arrival at a rural destination.
The evaluation design compares visit rates between devices likely to have been exposed to the advertising in the distribution area and devices that were not, producing a visit-rate lift rather than a modelled estimate. That matters for public-sector tourism budgets, which are increasingly required to demonstrate outcome rather than output. The project’s official name — “Visualisation of excursion behaviour and promotion of visitor and consumption growth in Shima Onsen using human-flow data” — makes the intent explicit: the advertising is one component of a data programme, not a standalone campaign.
The choice of taxis as a medium is instructive. In regional Japanese cities, taxis move through commercial districts, station forecourts and residential neighborhoods with routes that reflect real travel demand rather than fixed transit corridors. Rooftop screens give an advertiser repeated presence across a compact geography at a fraction of the cost of a large-format installation, and the vehicle itself carries an implicit association with travel and movement — a useful frame for a destination promoting a getaway.
For Shima Onsen, the objective is not mass awareness but qualified consideration. The town competes with better-known onsen destinations for a finite pool of domestic travellers, many of whom make decisions weeks or months ahead. Reaching them during everyday movement in two nearby cities, then measuring whether exposure correlates with arrival, is a more disciplined approach than a broad brand campaign.
The project also points to a wider trend in Japan’s OOH market, where smaller municipalities and regional tourism bodies are experimenting with mobile and measurable formats as large-format urban inventory becomes more expensive and more concentrated in the major metros. If the Gunma trial produces a clear lift, the model — inexpensive mobile media plus local beacon measurement — is likely to be replicated by other regional destinations.
Why it matters: Gunma’s taxi rooftop screens plus 25 onsen-area beacons create a measurable link between urban advertising exposure and rural destination visits, offering a low-cost, outcome-based model that regional tourism bodies across Japan can replicate.
Source: PR TIMES / Essen Inc.
