Naihanchi (ナイハンチ) is a karate kata, performed in straddle stance. It translates to 'internal divided conflict'. The form makes use of in-fighting techniques and grappling. In Shorin-Ryu and Matsubayashi-ryū Naihanchi Shodan is the first ni kyu although it is taught to yon kyu occasionally before evaluations for the ni kyu rank. It is also the first Shorin-ryu and Shindo jinen-ryu kata to start with a technique to the right instead of the left. There are three modern kata derived from this. Some researchers believe Nidan and Sandan were created by Anko Itosu, but others believe that it was originally one kata broken into three separate parts. The fact that only Naihanchi/Tekki Shodan has a formal opening suggests the kata was split.

Ankō Itosu is considered by many the father of modern karate. This title is also often given to Gichin Funakoshi because of the latter spreading karate throughout Japan, but only after Ankō sensei had introduced the art of Okinawate to the country.