Japan Adds 5.7 Billion Yen More to Nepal’s Nagdhunga Tunnel, Pushing the Project Closer to the Finish Line

Japan has agreed to provide an additional Official Development Assistance loan of 5.7 billion Japanese yen for Nepal’s Nagdhunga Tunnel Construction Project, giving the country’s most closely watched road tunnel another major financial boost.

The agreement was signed in Kathmandu by Finance Secretary Ghanashyam Upadhyaya and Japanese Ambassador to Nepal Maeda Toru, according to the sources. With this new round of support, total Japanese loan assistance for the project now stands at roughly 22.3 billion yen.

A bigger push for a landmark tunnel

The Nagdhunga Tunnel is widely seen as a transformative infrastructure project for Nepal because it is designed to improve the road connection through the busy Nagdhunga Naubise corridor and ease movement between Kathmandu Valley and other parts of the country. Earlier government and JICA materials described the tunnel as a key upgrade to the trunk route linking Kathmandu, major cities, and the Indian border.

The project aims to reduce travel time, improve traffic safety, and make the transport network more efficient. It also includes related works such as access roads, bridges, and support for construction supervision and operation management.

Why the extra financing matters

Japan’s new loan raises the total Japanese contribution well beyond the original 16.636 billion yen package that was agreed in 2016. That earlier financing was framed as a highly concessional soft loan, with extremely low interest and a long repayment period, underscoring Japan’s long-running role in supporting the project.

The additional funding suggests that the tunnel’s scale, complexity, and completion requirements still need sustained backing. In practical terms, the new loan helps secure the final stages of a project that has already been positioned as a major milestone for Nepal’s road infrastructure.

Nepal’s first major road tunnel

The Nagdhunga Tunnel carries symbolic as well as practical importance. As Nepal’s first major road tunnel, it represents a shift toward modern highway engineering in a country where difficult terrain has long made transport slow and vulnerable to congestion and safety risks.

Once complete, the tunnel is expected to provide a more direct and reliable route through one of the nation’s busiest gateways. That could mean shorter travel times for commuters, more efficient freight movement, and fewer delays caused by traffic bottlenecks at the pass.

What to watch next

With the new financing in place, attention now turns to how quickly the project can move through its remaining construction and finishing work. For a project of this size, funding continuity is often just as important as engineering progress, and the latest loan signals that Japan and Nepal remain committed to seeing it through.

If completed as intended, the Nagdhunga Tunnel could become one of Nepal’s most important transport upgrades in years, and a high-profile example of how concessional financing can help unlock difficult infrastructure projects.