Calligraphy
Calligraphy is considered an art form by many, and is typically used not only among shugenja, who use advanced ciphers and scripts to protect their mystical secrets, but also by artisans and courtiers, who use it to impress others as part of their complex schemes to gain favor in court. Training in calligraphy is not necessary as part of literacy, as all samurai are literate, but it does allow one to show refinement and sophistication.