Several possibilities come to mind:
1/ It is a misunderstanding/mistranslation by the people leading the tour. After all the masters are also referred to as 'Takumi'.
2/ It is a throw down from the origins of the camera business where they copied German cameras and lenses, maybe they 'borrowed'some other terminology too.
The way I read it they are called Takumi, which means master craftsman or meister.
Or a third possibility. The terms are interchangeable, so they used the Western term, figuring that their visitors would understand the meaning of meister more readily.
Very true. For sure the word Meister, in our Latin alphabet, is not written on the badge referred to, so there is an element of translation in it.
Having said all that, lets not get too concerned with minutiae, rather lets revel in the levels of skill, quality, and commitment Canon as a company are dedicating to getting us such competent gear.