Ginza Mitsukoshi department store's longtime renovation project is nearing completion just as the department store industry faces tough times.

On Sept. 11, its renovated 80-year-old store will open with its combined floor space increased by 1.8 times, thanks to a new annex boasting 12 stories and two basement floors.

"Increasing floor space has been Ginza Mitsukoshi's longtime wish," Kunio Ishizuka, Isetan Mitsukoshi Holdings president, said last month to announce the completion of the renewal.