Why does the Japanese Bushido spirit commit suicide if it loses?

Bushido spirit is the ability and quality of doing things, which is greater than the importance of one's life and is unfavorable to doing things. For Japanese men, this hurts personal dignity. It is said among peers that life is worse than death if it hurts personal honor. Feudal society also had many similar spirits, but Japan's own feudal cultural atmosphere was very strong. Japanese education is very strict with themselves, which leads to the inheritance of Bushido spirit to this day.

In fact, this kind of thing is not so strange in many cases. With the development of society, it is common that a collective interest or even a sum of money is far higher than a person's life, but it is handled differently in many places.