A Japanese real estate leasing company says it has found defects in more than 11,000 buildings nationwide.

Leopalace 21 told NHK that it inspected about 14,000 of its buildings by January 28th and found that 11,243 of them have problems.

The inspection was prompted by the discovery last year that Leopalace had failed to install fire-resistant walls in more than 200 of its buildings.

Company officials say they will ask 7,711 residents of 641 buildings to move out by the end of next month at the firm's cost. They say these buildings are at greater risk because the fireproof structures in the ceilings do not meet government standards.

Leopalace says it plans to finish inspecting the remaining 25,000 buildings by June, and carry out repairs by October.