Seppuku

Honorable suicide commited by Samurai after they have shamed themselves or are failed their masters. Samurai could be ordered to commit suicide by their lords (Daimyo)
The samurai would disembowel himself, and when the pain got to be too much to where he might shame himself, his second would decapitate him.

Ritual suicide by disembowelment carried out by samurai. Literally means "stomach cutting." The samurai committing seppuku would shove a dagger such as a tanto into their stomach while another samurai acted as their second by lopping off their head.

Ritual suicide by disembowelment. Some who commit seppuku have a second person decapitate them after the one who kills himself commits the disembowelment.

Seppuku is the ancient art of killing yourself if you get super pissed and can’t find anybody else to kill. Ninjas use all sorts of crap to kill themselves—guns, ropes, knives, lasers, spears, etc.—and don’t even think twice about it. These guys would kill themselves for just about any reason and often for no reason at all: that’s why we there are so few ninjas today.

Step 1 Get a frisbee from the store or friend.

Step 2 Clean the Frisbee.

Step 3 Make sure your parents aren’t around

Step 4 Put something slippery on it, like butter or cream.

Step 5 Get really super pissed.

Step 6 Fold the Frisbee hard (this is crucial)

Step 7 Keep folded and insert Frisbee into mouth hard.

Step 8 Push hard until you can’t see it.

Step 9 Wait.

Step 10 Die.

the act of eating Japanese takeout naked in the middle of the road in order to impress friends and bestow honor to your family.

"Seh-poo-koo"

A Japanese suicide ritual where you cut the belly open. It is believed that if you commit suicide this way, it will let your spirit exit the body at ease.

A masturbatory sexual act in which a man penetrates the outer sphincter of his anus with the tip of his beef whistle.