Seppuku known as harakiri (腹切り, "cutting the stomach"); the term "harakiri" (often misspelled/mispronounced "hiri-kiri" or hari-kari by English speakers) is more familiar to non-Japanese speakers than the term "seppuku". "Harakiri" is written with the same kanji as "Seppuku", but in reverse order with an okurigana. In Japanese, the more formal "seppuku", a Chinese "on'yomi" reading, is typically used in writing, while "harakiri", a native "kun'yomi" reading, is used in speech. Ross notes, It is commonly pointed out that hara-kiri is a vulgarism, but this is a misunderstanding. Hara-kiri is a Japanese reading or "Kun-yomi" of the characters; as it became customary
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,