Two things occurred to me after I last posted.
First, black pakka wood (used on a lot of knives) is basically treated or prepared in such a way that it is very water resistant. Wood is often called stabilized when this is done. Synthetic materials like Corian, micarta, or G-10 are extremely water resistant and, functionally, its difficult to beat them. Pakka wood is much more user friendly compared to non-stabilized woods. I dont know if the birch on the Miyabi youre referring to is stabilized but, if not, Id consider sticking with stabilized woods or synthetic materials in a commercial kitchen.
Two, my sister and other chefs have complained about others using their knives without permission. Id consider using a knife that doesnt attract unwanted attention, depending on whether or not you work with people who respect your tools. Fancy handles (unfortunately, anything thats not black) and damascus blades attract attention. The average, modern kitchen knife has a black handle and plain blade. As I type this, that combo seems boring but it may be the key to keeping other hands off your knife.
My thoughts; I hope they help.
ROSH