There are four main weave types that are used for BJJ (Brazilian jiu jitsu) gis. They are single weave, double weave, gold weave, and pearl weave. Single weave is more affordable and light weight, double weave is heavier and used more for judo gis. Gold weave is used more in traditional gis and is prone to shrinking. Pearl weave is the most common weave type used in modern gis and is a good balance of comfort and durability.
Mens Judo Weight Classes: Extra Light: up to 121lbs (55 kg); Half-Light: 121lbs (55kg) – 145lbs (66kg); Light: 145lbs (66kg) – 160lbs (73kg); Half-Middle: 160lbs (73kg) – 178lbs (81kg); Middle: 178lbs (81kg) – 198lbs (90kg); Half-Heavy: 198lbs (90kg) – 220lbs (100kg);
Heavyweight: 220lbs+ (100+ kg)
Typically, it takes roughly 6-10 years on average to earn a black belt judo as an adult. With consistent judo practice of two to three times a week it is realist to achieve a black belt during this time span.
Modern day Japanese jiu jitsu is largely ineffective as a practical martial art. While it initially influenced several martial arts like judo and Brazilian jiu jitsu, finding a legitimate, practical Japanese jiu jitsu school would be quite difficult.
Oss in jiu jitsu is often used to mean “yes” or as a term of acknowledgement, understanding, or approval. It is most often used after receiving instruction, before/after a sparring round, or at the end of a bjj class. It is pronounced as “oh-sss,” with the ‘sss’ sound similar to the hissing of a snake.
The best martial arts for self-defense is a combination of Brazilian Jiu jitsu, Muay Thai, and wrestling. An effective martial art should include live sparring and high level competition.
Judo emphasizes throws and takedowns, focusing on leverage and balance with minimal grappling on the ground. Brazilian Jiu-Jitsu which evolved from Judo does include throws and takedowns but prioritizes ground fighting and submission techniques.