Karate on Wikipedia
Shotokan on Wikipedia
Aikido on Wikipedia
http://shitokai.com/
https://hombudojokarate.com/
http://www.andrebertel.blogspot.com/
http://www.karatebyjesse.com/
http://www.shinkitaikarate.ca/Scona/Glossary/K/keikogi/keikogi.html