By acquiring Vodafone Japan Softbank CEO Son brought competition to the industry and challenged the duopoly of DocoMo and KDD telecom providers. After acquiring Sprint Son is taking a hands on approach to shakeup management at the company, which has lagged behind T-Mobile in building its subscriber base. After years of losses Sprint now faces the prospect of a complete makeover from the old way of doing things. Sprint is based in Overland, Kansas. Son says Sprint is like Japanese lords in feudal Japan who controlled everything in their lands, and said Sprint is a Kansas Daimyo. Masayoshi Son has asked executives to fire all the ad agencies and start over, at one point asking executives if they were stupid. Son has established shadow offices at San Carlos, California to monitor weekly progress at Sprint.