Seppuku time a European saw formal seppuku was the "Sakai Incident" of 1868. On February 15, eleven French sailors of the "Dupleix" entered a Japanese town called Sakai without official permission. Their presence caused panic among the residents. Security forces were dispatched to turn the sailors back to their ship, but a fight broke out and the sailors were shot dead. Upon the protest of the French representative, financial compensation was paid and those responsible were sentenced to death. The French captain was present to observe the execution. As each samurai committed ritual disembowelment, the violent act shocked the captain, and
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,