Shikona

A shikona (Japanese: 四股名 or 醜名) is a sumo wrestler's ring name. The tradition of ring names in sumo dates back to the Muromachi period and established itself during the Edo period, where they were used as a means to hide the identities of the rikishi.

Given by the master to his disciple, this pseudonym doesn't follow any fixed rules, but is chosen in accordance with numerous influences, drawing its characters from the wrestler's inspiration or family, from the history of his stable or even from the master's own name.