In Neak Loeung, Cambodia, cars had to queue for long hours before they could board a ferryboat. The bottleneck in local traffic was solved by Japan with the construction of the Tsubasa Bridge, which began in 2010 and was completed in 2015. This is an example of how Japan responded flexibly to the local needs, taking into account the climate and existing social issues. 

The Mekong River dividing the town of Neak Loeung flows at a rate of 5 knots in the rainy season. Japanese engineers applied a method so that work would be accomplished during the dry season when the river waters were low. Thus the Tsubasa Bridge was completed in 2015 as planned.

Since the bridge was opened to traffic, cars cross the Mekong River in 5 minutes, resolving the problem of waiting long hours for ferry crossing.

The bridge also serves as an international traffic route connecting the Mekong Economic Zones.