Yeah.. sure as hell it aint Seppuku. U dun stab ur own chest n
through the rib cages n slice to the sides. hahaha ouch~
In "Seppuku" another person stands over the suicide
victim with a samurai sword and cuts off his head after he
disembowels himself.
That was how one of my all-time
favourite authors killed himself. His helper cut off his head after
he disemboweled himself.
"The Sailor Who Fell from Grace with
the Sea (Japanese: 午後の曳航,
meaning The Afternoon Towing), is a novel written
by Yukio Mishima, published in Japanese in 1963 and
translated into English by John Nathan in 1965."

"On November 25, 1970, Mishima and four members of the Tatenokai,
under pretext, visited the commandant of the Ichigaya Camp—the Tokyo headquarters of the
Eastern Command of Japan's Self-Defense
Forces.[4] Inside,
they barricaded the office and tied the commandant to his chair.
With a prepared manifesto and banner listing their demands, Mishima
stepped onto the balcony to address the soldiers gathered below.
His speech was intended to inspire a coup d'etat restoring the
powers of the emperor. He succeeded only in irritating them,
however, and was mocked and jeered. He finished his planned speech
after a few minutes, returned to the commandant's office and
committed seppuku. The customary kaishakunin duty at the end of
this ritual had been assigned to
Tatenokai member Masakatsu Morita, but Morita
was unable to properly perform the task: after several attempts, he
allowed another Tatenokai member, Hiroyasu Koga, to behead Mishima."