Cantrelle's Martial Arts is a San Jose martial arts school founded in June 2017, offering Kenpo Karate and self-defense instruction with a community-focused approach. The school is co-owned by Becky Cantrelle, a 5th Degree Black Belt who teaches daily and helps lead studio operations. The business notes more than 50 years of martial arts experience behind its instruction and offers one free introductory class with no cost or obligation.