Why serve cabbage with Yakitori?

Regardless of whether it’s an eating establishment for the hungry masses or an exclusive restaurant, if you order Yakitori, it always comes with one thing—cabbage. But why cabbage? Why not any other vegetable?
Cabbage has a special effect. If you eat meat with cabbage, cabbage will encourage you to eat a lot. In the herbal cuisine of the Chinese culinary arts, cabbage is used to prevent inflammation of the intestine and to promote the appetite. The anti-inflammatory constituents of cabbage protect the stomach wall against oil or fat. Strangely vegetables other than cabbage have little effect.
Those running the Yakitori restaurants know about the effects of cabbage by experience. Whatever Yakitori you order, you can be sure it will always come with cabbage.
Cabbage is served free when ordering Yakitori.