Seppuku absolutely requires a minimum of two participants. Waiting to die from disembowelment is a notoriously drawn out process, very messy and trying for the spectator. Since the Empo era (late 17th century) only loonies such as Mishima and characters in Samurai dramas actually waited for hours to contemplate their entrails by- the-light-of-the-rising-sun - there is no need for you to indulge in anything so vulgarly melodramatic. You will require the services therefore of a Kaishakunin, or "second" whoís duty it is to despatch you with a sharp sword at your signal. The exact moment he strikes is entirely for you to decide - obviously the later and more painful your death the better your chances with that next visa. For maximum effect and minimum pain we suggest you fake it. Be sure however that your second has no higher ideals than you, and of course better nerves and swordsmanship.