NEXCO West Japan is reconstructing damaged sections of the Kyushu Expressway following the 2026 Kumamoto earthquake [1].
The restoration is critical for returning regional logistics and commuter travel to normal levels in Kumamoto Prefecture. Because the expressway serves as a primary artery for the region, ongoing traffic restrictions continue to disrupt movement through the area [1, 2].
Construction is focused heavily on the Kawata Bridge area in Yatsushiro City [1, 4]. NEXCO West Japan said it will replace the bridge by conducting work on the inbound and outbound lanes sequentially [1]. Despite the start of these works, the company said no firm completion date has been set for the full restoration [1].
Timeline estimates for the project vary between sources. A spokesperson for NEXCO West Japan said that a completion timeline has not been established [1]. However, Prof. Masahide Matsumura of Kumamoto University said that full restoration will take more than six months [2].
Some segments of the infrastructure are returning to service faster than the main reconstruction projects. Minister Kaneko Yasuyuki said the Yokoe Bridge was scheduled for a temporary reopening in mid-August 2026 [3].
Traffic restrictions remain in place as crews work to stabilize the roadway and replace damaged structures. The 2026 earthquake caused significant damage to both bridges and the road surface, necessitating the current large-scale engineering effort [1, 2].
“Full restoration will take more than six months.”
The discrepancy between the government's temporary bridge openings and the lack of a firm final completion date suggests a tiered recovery process. While essential connectivity is being restored via temporary measures, the structural instability caused by the 2026 earthquake requires a long-term engineering solution that may leave regional transit constrained for the remainder of the year.
