What was a result of the sankin Kotai system?

One major result of the sankin kotai system was that it kept regional daimyo subservient to the bakufu.

Forcing alternating attendance between their domains and Edo proved to be a great economic strain to the daimyo. The funds needed to maintain their residences in both Edo and their daimyo, not to mention the cost of traveling to and from Edo with their contingent, was exacting, to say the least.