Seppuku approaching her, they would find that she had ended her life long before they reached her. Stephen R. Turnbull provides extensive evidence for the practice of female ritual suicide, notably of samurai wives, in pre-modern Japan. One of the largest mass suicides was the 25 April 1185 final defeat of Taira no Tomomori establishing Minamoto power. The wife of Onodera Junai, one of the Forty-seven Ronin, is a notable example of a wife following seppuku of a samurai husband. A large number of honor suicides marked the defeat of the Aizu clan in the Boshin War of 1869, leading into
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,