The Briss Kingdom is a kingdom located in the South Blue. St. Briss had come from this country. It was mentioned once in the Jaya Arc.
The only thing that is known about this country is that, like other countries from this South Blue region, it followed the custom to cover teeth with tar to help preserve them.
Nothing is known about the country's geography because it has yet to make an appearance.
One Piece Manga — Vol. 24
Robin give details about the Briss Kingdom.