My nephew is starting Judo classes in Missouri. The gym that he joined does half Judo and half BJJ. They do belt tests every 3 months for each one. They only have one teacher who does both the Judo and BJJ. They meet two nights a week for a total of 3 hours. Is this something that is common throughout? When I did Judo as a kid, BJJ was something you did completely separate. Thanks for the answers!