Japan Karate Association (Tokyo) is where it all started. The association is over 60 years old and still going. To train at the JKA is an experience you will cherish forever. If you have the time and money, visit the JKA in Tokyo and discover the history of Shotokan Karate. Japan Karate Association.
Some of the other international JKA Countries:
JKA Japan: https://www.jka.or.jp/en/
JKA India: http://www.jkaindia.org
JKA America: https://jkawfamerica.com/
JKA Europe: https://jka-europe-2020.com/
JKA France: http://www.francejka.com
JKA England: http://www.jka-england.org
JKA Netherlands: http://www.jkanederland.com/
JKA – Australia: http://www.jkaaustralia.com.au
JKA – New Zealand: https://www.jkanz.org/
JKA Bahrain http://www.jka-bahrain.com/
Other countries are listed on the JKA Japan web
site https://www.jka.or.jp/en/branch-search-en/