Maryland Seido Karate What is Seido Karate History and Lineage Serious Martial Arts Training What makes Seido Karate different Frequently Asked Questions about Seido Karate Maryland branches: Towson Howard County Damascus Catonsville Contact us! Seido Karate in Maryland Seido ( say-dough ) karate provides training for self-development, self-defense, and physical fitness for adults and children.