Ko-ryū (Japanese:古流, 'old school') is aJapanese term for any kind of Japanese school of traditional arts. The term literally translates as "oldschool" (ko—'old',ryū—'school') or "traditional school". It is sometimes also translated as "old style".

Koryū is often used as a synonymousshorthand forKo-budō (古武道), ancientJapanese martial arts that predate theMeiji Restoration of 1868.^[1][2][3] In English, the InternationalHoplology Society draws a distinction betweenKoryū andKobudō martial arts based on their origin and the differences between their ranking of priorities concerning combat, morals, discipline, and/or aesthetic form.^[4]

Ko-ryū is one of the oldest and most traditional schools ofIkebana. From it, various other schools have formed that carry its name, such as theNihon Ko-ryū,Katsura Ko-ryū,Miyako Ko-ryū,Ko-ryū Shōshōkai, andKo-ryū Shōōkai (古流松應会).^{[5][6][7][8][9][10]}

• Draeger, Donn F.Classical Bujitsu (Martial Arts and Ways of Japan). Weatherhill, 1973, 2007.ISBN 978-0834802339
• Hall, David A.Encyclopedia of Japanese Martial Arts. Kodansha USA, 2012.ISBN 978-1568364100
• Skoss, Diane, Editor.Koryu Bujutsu: Classical Warrior Traditions of Japan. Koryubooks, 1997.ISBN 978-1890536046
• Skoss, Diane, Editor.Sword and Spirit: Classical Warrior Traditions of Japan, Volume 2. Koryubooks, 1999.ISBN 978-1890536053
• Skoss, Diane, Editor.Keiko Shokon: Classical Warrior Traditions of Japan, Volume 3. Koryubooks, 2002.ISBN 978-1890536060

• Japanese martial arts
• Japanese martial arts terminology
• Kadō schools

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