Possible Clues:

• Ritual Japanese suicide involving disembowelment
• I hark to the air of felo de se
• That's the last thing you'd do for yourself
• Suicide in traditional Japanese style
• Wit the help of ait, I hark how to end it all
• Ritual Japanese suicide
• Traditional Japanese suicide by disembowelment
• Tea, not cold, a drink one's finishing off oneself
• Cheer up, getting a drink before one's ritual departure
• A self-effacing action of the Japanese