A sales clerk speaks with a customer in front of Microsoft Corp.’s display at an electronics store in Tokyo. Microsoft’s division in Japan says it saw productivity grow by 40% after allowing employees to work for four days a week rather than five.

A sales clerk speaks with a customer in front of Microsoft Corp.’s display at an electronics store in Tokyo. Microsoft’s division in Japan says it saw productivity grow by 40% after allowing employees to work for four days a week rather than five.