U.S. investment firm Bain Capital is considering relisting Skylark Co. on the first section of the Tokyo Stock Exchange as early as next year, according to sources.

Bain Capital, which acquired around 99 percent of the troubled restaurant chain operator in 2011 for ¥160 billion, aims to recoup the investment through the relisting because Skylark's profitability is improving, the sources said Wednesday.

Skylark expects the relisting to make it easier to raise funds for opening new restaurants at home and abroad and launching new types of restaurants.