Do they have a restaurant restroom or public restroom only?

Restaurant only. There is also another restroom upstairs.

There is one upstairs.

Large restrooms also located outside and available to all visitors

Thanks for your responses. I found that there is a clean private restroom on the second floor at sit-down restaurant level.

Restaurant only

Restarunt has private toilet at ground floor,

Restaurant only, public is outside behind the restaurant.

Public restroom is downstairs