seppuku

is, in one of its various forms, called kanshi, the act of making a mortal cut in secret, dressing the wound, and then revealing it to the lord while announcing a protest of the lord's action.

death of understanding. The retainer would make one deep, horizontal cut into his stomach, then quickly bandage the wound. After this, the person would then appear before his lord, give a speech in which he announced the protest of the lord's action, then reveal his mortal wound. (wikipedia: seppuku)

is, in one of its vairous forms, called jumonji giri, or cross shaped cut, a ritual suicide where there is no 'second' to put a quick end to the samurai's suffering. The samurai was expected to bear his suffering quietly until perishing from loss of blood, passing away with his hands over his face.

J monji giri ( 'cross-shaped cut'), in which there is no kaishakunin to put a quick end to the samurai's suffering. It involves a second and more painful vertical cut on the belly. A samurai performing jumonji giri was expected to bear his suffering quietly until perishing from loss of blood, passing away with his hands over his face. (wiki)

is, in one of its various forms, called junshi, the custom of following a master in death.

Tokugawa Shogunate edict banning Junshi (Following one's lord in death) From the Buke Sho Hatto (1663 AD) -'That the custom of following a master in death is wrong and unprofitable is a caution which has been at times given of old... but, owing to the fact that it has not actually been prohibited, the number of those who cut their belly to follow their lord on his decease has become very great. For the future, to those retainers who may be animated by such an idea, their respective lords should intimate, constantly and in very strong terms, their disapproval of the custom. If, notwithstanding this warning, any instance of the practice should occur, it will be deemed that the deceased lord was to blame for unreadiness. Henceforward, moreover, his son and successor will be held to be blameworthy for incompetence, as not having prevented the suicides.' (FROM: JOHN CAREY HALL, THE TOKUGAWA LEGISLATION, YOKOHAMA 1910, PP. 286-319)

is a form of ritual suicide in which the so-called 'second' (or decapitator) was either a friend or an opponent wanting to salute his bravery.

The second was usually, but not always, a friend. If a defeated warrior had fought honorably and well, an opponent who wanted to salute his bravery would volunteer to act as his second.(wikipedia)

is, in one of its various forms, called funshi, a form of suicide whose purpose it was to state dissatisfaction or protest.

indignation death. which is any suicide made to state dissatisfaction or protest. (wikipedia seppuku)

is an act that could only be committed with permission from one's lord.

Samurai generally could only commit the act with permission. (wikipedia)

seppuku, n.All

seppuku