A body advising UNESCO has recommended postponing registering the National Museum of Western Art in Tokyo and 21 other structures designed by French architect Le Corbusier as World Heritage cultural sites, the Cultural Affairs Agency said Tuesday.

The recommendation by the International Council on Monuments and Sites, or ICOMOS, is believed to make it difficult for UNESCO's World Heritage Committee to decide on registering the buildings at a June 22-30 meeting. In January 2008, Japan decided to recommend that the museum's main building, designed by Le Corbusier (1887-1965), whose real name was Charles Edouard Jeanneret-Gris, be registered on the list.

In February last year, six countries, based on a proposal from France, jointly submitted a recommendation to register 22 buildings designed by Le Corbusier.