Hara-kiri

On the downfall of his power in 1867 he was urged by one of his Council to save the honour of his family by a voluntary suicide. He flatly refused to do so and left the room, whereupon his faithful adviser retired to another part of the castle and solemnly performed the hara-kiri.

...the report that was issued at the time officially blamed a disgruntled crewman who had been accused of theft and may have decided to do the ultimate hara-kiri, but quite how you prove that I don't know...

Regarded logically, therefore, Japan’s decision to go to war made no sense. It was hara-kiri.

They are haunted by the spectre of the 1984 election, when Mr Walter Mondale committed hara-kiri by acknowledging the need to raise taxes if America were to get its economy straight.

But with GSM players lobbying hard for more spectrum, taking MVNOs on board now would be hara-kiri.