Rakuten, often referred to as the “Amazon of Japan” with extensive holdings in e-commerce and streaming media, has made an acquisition that will help it build up and flex a newer arm of its business: communications services. Today, the company announced that it is buying Innoeye, an engineering company based out of Herndon, VA, with offices also in India, which builds cloud-based solutions aimed at carriers and enterprises to manage networks and deploy services across them. The financial terms of the deal were not disclosed.