Seppuku associated with suicide of samurai wives. The term was introduced into English by Lafcadio Hearn in his "Japan: An Attempt at Interpretation", an understanding which has since been translated into Japanese. Joshua S. Mostow notes that Hearn misunderstood the term "jigai" to be the female equivalent of seppuku. The first recorded act of seppuku was performed by Minamoto no Yorimasa during the Battle of Uji in the year 1180. Seppuku was used by warriors to avoid falling into enemy hands, and to attenuate shame and avoid possible torture. Samurai could also be ordered by their "daimyō" (feudal lords) to carry
Samurai Warriors 4 , a social spin-off game released on April 22, 2014 for the mobile phones also to commemorate the series' 10th anniversary. Koei Tecmo also collaborated with the Japanese Racing Association (JRA) to release on May 25, 2014 for the PC. "Derby Musou" reuses assets from "Samurai Warriors 4" to create a horse racing game, like that of the "Winning Post" series, with famous Japanese racehorses. Eight characters from "Samurai Warriors 4" make up the playable cast, plus Matthew C. Perry (known in-game as just Perry). The game received a revision, titled , which was released in Japan on February 11,