No problem, just understand that what I'm about to give you is the cliffnotes version. You'll have to do some looking up yourself.
KNOWN PERSONALITIES ASSOCIATED WITH THE DOJO OF BITTER LIES
Bayushi Tangen (Creator of Technique and philosophy)
Bayushi Kwanchai (Founder of dojo, first and only student of Tangen)
Bayushi Hisako (Wife of Kwanchai, now senior Sensei at the dojo)
Bayushi Sharaku (also a Dream Sect Kolat)
Bayushi Ryouya (student under Hisako's regime)
Bayushi Yousui (student under Hisako's regime)
Bayushi Gaho (student under Hisako's regime)
Bayushi Tomo (student under Kwanchai's regime)
Bayushi Kaneo (student under Kwanchai's regime)
Bayushi Shaiga (student under Kwanchai's regime)
Bayushi Shusui (student under Kwanchai's regime)
Bayushi Utamuro (Doesn't say so on his card, but certainly seems like it)
Bayushi Eisaku (student under Kwanchai's regime)
Bayushi Shinobu (student under Kwanchai's regime)
The story of the dojo goes like this: this guy, Tangen, who had more guts than brains, accidentally invented a Technique that took advantage of his stupendous luck. He tried to die a valiant death in combat many times -- and failed every time. When his clan was banished to the Burning Sands, it at last dawned on him that he was not a great and terrible warrior, but a guy who was really, really lucky. When he came back to Rokugan, he hid from everyone else and probably wrote some extremely emo poetry. Another incredibly lucky guy, Kwanchai, seeks Tangen out and begs to be taught the techniques. Tangen refuses. Kwanchai pleads. Eventually, Tangen relents. Kwanchai comes back from his training the incredibly lucky juggernaut of calamities that his sensei was, and unlike his sensei, doesn't feel remorse, and agrees to begin teaching students the instant he can. Yojiro, recognizing opportunity, funds this mad endeavor and creates the Dojo of Bitter Lies. Kwanchai is married to Hisako, and equally lucky but much more sane bushi, and they begin training lots of 'madmen,' rounding out the collection of clans that have a group of arguably insane guys working for them (Crab - berserkers, Crane - harriers, Dragon - ise zumi, Lion - Deathseekers, Phoenix - Ishiken, Unicorn - Moto).