What's the difference between seppuku and harakiri?
The most famous form of seppuku is also known as harakiri (腹切り, "cutting the belly") and 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.[1] Harakiri is the more common term in English.