Guessing, but just what it sounds like - a martial arts training gym. Generally, they are low revenue businesses, relegated to subleasing from other athletic gyms (like gynmastics facilities), out of community recreation centers, or in industrial warehouse areas. Sometimes you’ll find them in strip malls, as well.

Theoretically, vacancies put pressure on mall owners to lower rents, perhaps to an affordable level for these dojos. Lowering rent also makes the mall less valuable than a vacancy. And owners don’t like lowering value if they can afford it, because they can leverage existing values.