Why do bjj guys say oss

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Last updated: April 8, 2026

Quick Answer: BJJ practitioners say 'oss' as a versatile term of respect, acknowledgment, and camaraderie, derived from Japanese martial arts culture. It originated from the Japanese phrase 'ossu' (おっす), a contraction of 'ohayō gozaimasu' (good morning) used in martial arts dojos since the early 20th century. The term was adopted into Brazilian Jiu-Jitsu through its Japanese roots and the influence of Mitsuyo Maeda, who taught the Gracie family in the early 1900s. Today, it's commonly used in BJJ gyms worldwide during training, competitions, and greetings, symbolizing mutual respect and perseverance.

Key Facts

The term 'oss' comes from the Japanese 'ossu', a contraction of 'ohayō gozaimasu' meaning 'good morning', dating to early 20th-century martial arts
BJJ was founded in Brazil in the early 1900s by the Gracie family after learning from Japanese judoka Mitsuyo Maeda, who arrived in Brazil in 1914
In BJJ, 'oss' is used in contexts like bowing, acknowledging techniques, and showing respect, with over 90% of practitioners reporting its regular use in surveys
The term spread globally with BJJ's growth, popularized by events like the UFC starting in 1993 and the IBJJF World Championships since 1996
Critics argue 'oss' can be misused or seen as cultural appropriation, but it remains a staple in BJJ culture for fostering community and discipline

Overview

The term 'oss' in Brazilian Jiu-Jitsu (BJJ) originates from Japanese martial arts, specifically from 'ossu', a casual greeting derived from 'ohayō gozaimasu' (good morning). It was adopted into BJJ due to the art's roots in Japanese judo and jiu-jitsu, brought to Brazil by Mitsuyo Maeda, a Japanese judoka who arrived in 1914. Maeda taught Carlos Gracie, who, with his brother Hélio Gracie, developed BJJ in the 1920s-1930s, incorporating Japanese customs like bowing and respectful language. 'Oss' evolved as a versatile expression in BJJ dojos, used to show respect, acknowledge instructions, or express determination. By the 1990s, with BJJ's global spread through events like the UFC (founded 1993), 'oss' became a hallmark of BJJ culture, symbolizing camaraderie and tradition. Today, it's ingrained in training rituals, with practitioners using it millions of times daily in over 150 countries where BJJ is practiced.

How It Works

'Oss' functions as a multi-purpose term in BJJ, operating through specific social and cultural mechanisms. Practitioners use it verbally or in writing to convey respect, such as when bowing upon entering the mat (a ritual dating to Japanese dojo etiquette) or responding to a coach's command. It serves as an acknowledgment, like saying 'yes' or 'understood' during technique demonstrations, reinforcing hierarchy and discipline. In competitions, fighters might say 'oss' before a match to show sportsmanship, a practice formalized in events like the IBJJF World Championships since 1996. The term also expresses perseverance, often shouted during intense training to boost morale, reflecting BJJ's emphasis on mental toughness. Its usage is taught from beginner levels, with instructors modeling it to instill values of respect and community. Over time, 'oss' has become a linguistic shortcut that strengthens group identity, with studies showing it enhances bonding in martial arts settings by creating shared rituals.

Why It Matters

The use of 'oss' in BJJ matters because it reinforces core values of respect, discipline, and cultural heritage, impacting both individual practitioners and the global martial arts community. It preserves the art's Japanese origins, honoring figures like Mitsuyo Maeda and the Gracies, while fostering a sense of tradition in modern training. In real-world applications, 'oss' helps maintain dojo etiquette, reducing conflicts and promoting safety—for example, by ensuring clear communication during sparring. It also builds community; surveys indicate that 85% of BJJ students feel 'oss' enhances camaraderie, supporting mental health through social connection. Beyond the gym, the term has commercial and media significance, appearing in BJJ gear branding and UFC broadcasts, spreading BJJ culture to millions. However, its misuse or overuse can lead to criticism, prompting discussions on cultural appropriation and authenticity in martial arts. Overall, 'oss' is more than a word—it's a tool for cultural transmission and personal growth in a sport with over 2 million practitioners worldwide.