Circle around the character "one" Bicycle playing Cards

The crest known as "Maruni Ichimonji" features a single horizontal line. The reason a single character was chosen for the crest is likely due to its clear and easily identifiable stroke count, as well as its martial and auspicious connotations. According to "Reference Taiheiki," the single line was interpreted as "katakinashi," or invincible, which was probably a factor in its selection as a crest. The fact that the single line was seen as signifying victory over enemies is supported by its frequent use in samurai names during the Warring States period, where it was often read as "katsu," or "to win." For example, Yamauchi Tsushima no Kami's name was written as "Kazutoyo" but read as "Katsutoyo," and Takigawa Kazumasu's son was named "Katsutoki." The character was often used to signify a warrior's honor, such as "ichiban nori" or "ichiban