Tokyo: Rakuten Inc announced Tuesday it plans to buy US based cash-back site Ebates for $1 billion, part of a series of overseas acquisitions aimed at building what the Japanese e-commerce company says will be the “world’s largest product line-up.”

With goods ranging from toys and cat beds to luxury watches and golf clubs, Rakuten is the top Internet retailer in Japan. It has made numerous overseas acquisitions, including Cyprus-based Internet phone application Viber Media and led a $100 million investment in online scrapbook Pinterest. Rakuten and San Francisco, California-based Ebates both have membership-based online shopping platforms. Retailers pay Ebates to advertise their products and Ebates then gives rebates for eligible online purchases.