The government is set to alter part of the plan to build a replacement facility for U.S. Marine Corps Air Station Futenma in Okinawa, to add seabed reinforcement work, government sources said Monday, possibly delaying the construction schedule.

Okinawa Gov. Denny Tamaki is likely to reject the central government's application for the additional work, given his strong opposition to the plan.

The central and Okinawa governments have been at odds over the planned transfer of the base from a crowded residential area in Ginowan to the Henoko coastal district of Nago. Under the plan, the move requires some 157 hectares of land reclamation and a V-shaped runway to be constructed.