Ronin
Ronin (浪人) is the word used to describe a kind of samurai without a master. Hundreds of years ago in Japan, it was very important for every samurai to have a master.
It also refers to somebody who has failed their university entrance exams and is studying for the next year's exams.
Ronin Media
A woodblock print by ukiyo-e master Utagawa Kuniyoshi depicting famous rōnin Miyamoto Musashi having his fortune told.
Ukiyo-e woodblock print by Yoshitoshi depicting Oishi Chikara, one of the forty-seven rōnin
Graves of the forty-seven rōnin at Sengaku-ji
Actors portraying ronin on left and right, employed samurai in the middle