In 2010, three decades after founding telecom giant SoftBank Corp., CEO Masayoshi Son took the stage at the company's June shareholders' meeting and made what he thought would be "the most important speech in my life."

The subject? His 30-year vision for the company.

As grand as that sounds, SoftBank's recent moves indicate that the firm is on course, as it spreads its wings and takes flight in the global telecommunications market.