Ethos Jiu-Jitsu Fullerton

Ethos Jiu Jitsu Fullerton operates at 618 N Harbor Boulevard, Unit A in Fullerton, California. The academy is led by co-founder and head instructor Ron Mukai, a second-degree Brazilian Jiu-Jitsu black belt under William Tetsch of Leon Jiu Jitsu. Mukai maintains an active training and competitive schedule alongside his coaching duties, working to instill strong character and practical self-defense skills in his students. The instructional curriculum features age-appropriate classes tailored for the entire family. Youth training includes peewee classes for children ages five to seven and structured kids sessions for ages eight to thirteen, with lessons reinforcing anti-bullying principles, confidence, and agility. Adult offerings consist of a fundamentals program focusing on positional concepts for beginners and an all-levels program exploring technical combinations and live rolling. Morning and evening training options accommodate varied schedules throughout the week. The academy delivers instruction to practitioners from Fullerton and neighboring communities including Anaheim, Brea, and Placentia. Prospective students can register online for a complimentary free introductory class.