The stalwart Crab are the defenders of Rokugan, responsible for ensuring the Empire's southern border is secure against the demons of the Shadowlands. Centuries of constant warfare against inhuman foes have hardened the Crab into tremendously powerful and brutally practical warriors, but they have little sense of civility or manners. As a result they are often considered crude and barbaric by the other clans.
The Crab have a long and storied tradition of excellence in sumai, whose social respectability can grant skilled Crab wrestlers access to courts where they might otherwise never be invited. Promising students are taught at the Grip of Earth Dojo, the principle home to the Crab Clan's sumai fighting technique. When another samurai encounters a Crab bushi utilizing sumai techniques, it is almost always a graduate of the Grip of the Earth Dojo.
A few Crab have specialized in knife-fighting over the years, enough for the clan to maintain a few sensei who teach advanced knife techniques. Many of these are sailors, especially Yasuki, who prefer a fighting style which uses small, cheap weapons in an environment where speed and mobility are more important than reach and power.
The limited Crab dueling tradition is maintained in the Unbreakable Blade Dojo. It emphasizes endurance rather than speed, teaching its students to endure their opponents' first blow in order to survive to deliver their own. Due to the Crab Clan's martial and pragmatic nature, the sensei of the Unbreakable Blade focus their training on lethal duels (both on the battlefield and in court) rather than on the duels to first blood that are more common in other clans.
When faced with insurmountable odds, a warrior often retreats to fight again another day. To the Crab Berserker, this is not an option. The Berserker will fight wherever his lord directs him, and focuses his entire being into that fight. The Berserker fights with no limits and continues to ferociously attack until either he or his enemies is bloodied and dead on the ground. The Berserkers often fight against the ravaging Shadowlands Horde and are said to match those beasts in rage and viciousness.
The Crab Clan is the first line of defense against the ravenous creatures of the Shadowlands, so that protective nature has seeped into many of their martial styles. The Defender of the Wall stands firm against the enemies he may face and weathers all the assaults focused in his direction. The Defender of the Wall is the perfect guardian, as he will let the world end before he lets an attacker pass him.
Once a Crane family, the Yasuki defected to join the Crab after their Doji masters refused to accept the questionable manner in which the Yasuki performed essential tasks necessary for the Crane to function. The Crab were far more practical masters, and under their leadership the Yasuki have become the most prosperous merchant patrons in the Empire. Their sensei emphasize the ability to find that thing one's opponents in court must have, and provide it for them at a low cost, ensuring both profit and gratitude.
The Toritaka Bushi School excels at destruction of creatures that come from the other Spirit Realms. Their style is fluid in order to adapt to any surprises that new monsters might spring upon them. Unfortunately this focus on otherworldly foes makes the Toritaka bushi a very specialized warrior, with few techniques that work against human opponents.
The Kuni Witch-Hunters are a small but highly skilled group of mystical warriors who serve the Crab Clan by hunting for maho-tsukai and Shadowlands infiltration within the Empire. They travel freely through Rokugan, often disregarding clan borders and jurisdictions... much to the displeasure of local authorities. Samurai from other clans tend to regard Witch-Hunters as superstitious and ill-mannered louts, but common folk throughout the Empire respect them and seek their aid whenever supernatural threats arise.
Once misunderstood, the Kuni Shugenja School has frequently been painted as a collection of obsessive madmen who delve too deeply into secrets no one should explore. Most Kuni would object to the label of madman, but beyond that they would admit the stereotype fits fairly closely with reality. The Kuni understand they must sacrifice certain inhibitions and reservations in order to serve their Clan and Empire to the best of their ability, and they do so without protest.
The Kaiu Engineers are the most formidable crafters in the Empire, and their skills are turned almost entirely to the Crab Clan's duty of defending Rokugan against the Shadowlands. Masters of construction and siegecraft, they are also formidably talented at the manufacture of arms and armor. Many Kaiu also serve as battlefield commanders, turning their talents at siege to the service of war.