The two-alarm fire took out a two-story building that was also going to house a yoga studio. Passersby snapped photos of the fire in progress.
Sakurai's restaurant was called Ten and was planned as a tiny (750 square feet) restaurant with only 13 seats.
Capt. Linda Henry of Dallas Fire-Rescue told the DMN that the fire appeared to be an accident that was started by welding going on inside. The building had only been finished on the outside.
Construction has begun on 201 apartments and 50,000 square feet of retail space. The project was originally scheduled to be complete by the end of 2013.
A spokesman for the complex said that the burned building will be torn down and rebuilt.