PROBLEM
Tokyo's complex underground station networks are nearly impossible to navigate with traditional 2D maps. PLATEAU, Japan's national 3D city model, provides city-scale digital twin data — but it stops at building exteriors, leaving the labyrinth of underground walkways and station interiors invisible, at some of the busiest transit hubs in the country.
SOLUTION
I create detailed Revit models of station interiors, underground walkways, and surrounding buildings across five JR East stations — Shinjuku, Shibuya, Takamatsu, Ikebukuro, and Sapporo — then convert them to FBX for use as 3D assets in Sta.navi, JR East's indoor navigation app. In parallel, I pipe the same models into CityGML through Blender and Bonsai, integrating them with PLATEAU's digital twin for seamless indoor-outdoor continuity.
Shinjuku in Sta.Navi
TECH STACK
IMPACT
The models now power Sta.navi, JR East's indoor navigation app, across five stations — giving commuters continuous guidance from street level down into the station and back out again at some of Tokyo's busiest transit hubs. The same data feeds PLATEAU's public release, extending Japan's national digital twin below ground, station by station.
ALSO MAPPED
Shibuya
Shibuya Stream, Sakura Stage, Hikarie, both station buildings, the elevated pedestrian walkway above the surrounding roads, and Scramble Square.
Takamatsu
The elevated walkway spanning from the station all the way to the ferry building, Symbol Tower, the station itself, and the Orne shopping center.
Ikebukuro
JR Ikebukuro Station’s concourse and surrounding retail network, modeled and mapped into the same coordinate system as the other four stations.
Sapporo
Almost entirely underground: the tunnel network and surface access stairs threading through central Sapporo Station.