Why are some Japanese soldiers killed in World War II cut off by their teammates?

Although Japan and China were animals and cruel in World War II, they would save their wounded comrades on the battlefield. If the wounded are abandoned for no reason, the sergeant will be shot, and even the captain of the army will be court-martialed. This is due to the team spirit of the Japanese army, which is one of the reasons why the Japanese are brave in fighting. Even the body will be taken back by the Japanese. If the war is too dangerous to take the body away, the Japanese will cut off the right arm of the body and take it away. If you can't even take your arm away, cut off your index finger and take it away. Because in the eyes of the Japanese, a person's body part has a soul, so they will think that the soul of their teammates can return to their hometown. In the late World War II, Japan also shot and wounded soldiers because the war was too urgent. But it must be when the matter is urgent enough to affect the action of the whole brigade, the captain of the army should make a detailed explanation, and a considerable number of soldiers should testify. We can deal with wounded soldiers just to complete the task, not for other people's lives. The Japanese army stressed that an army must have lifelong friendship and cannot hurt its teammates for its own life, unless it is for a higher task. However, there are exceptions to any fact. When the war worsens to the extreme, the Japanese team spirit will also be completely disintegrated. In the Battle of Impal and the Battle of the Philippines in 1944, the Japanese army was defeated. In the process of losing and fleeing, they mercilessly abandoned their injured comrades, hospitals and logistics units, leaving them on the verge of death. Therefore, in the first half of World War II, the mental state of the Japanese army can be said to be very fatal, but unfortunately it failed later. Wounded soldiers who can be cured will return to the army. If you can't cure the disability, you can return to the army as a death squad member and send an explosive bag to let them rush to be a human bomb. You can also go back to war mobilization and take care of prisoners of war, but you will be despised. Therefore, Japanese wounded soldiers would rather be death squads at the front than retreat to the rear to make people laugh.