Is "Kaizen" a Slogan or a Methodology for the Seattle Mariners?

Here is an interesting article that a few people pointed me toward the other day about the Seattle Mariners team:

Mariners Sunday mailbag: Explaining the Japanese origin of the team's new slogan

“Manager Scott Servais does have a mantra each year for the team, which is supposed to serve as a reminder of their purpose and responsibility…

This year, Servais chose a Japanese word: Kaizen.

An avid reader, Servais got it from a book by Masaaki Imai called Kaizen: The key to Japan's competitive success.”