Seppuku.
切腹 (seppuku) and 腹切り (harakiri) both use the Kanji "cut" and "stomach" and are ancient forms of Japanese ritual suicide originally reserved for Samurai to give them an honorable death instead of being killed by their enemies.
Because they thought Japanian sounds weird so they call Japanese.
because theyuse pillows every time
"no" in Japanese is "iie". Hold the I sound longer than you normally would. This is because "ie" is also a Japanese word, but the I sound but means house instead of no if you don't hold the I sound very long.
The Japanese prefer to bow.
because there main system is rice and was there ever since 2000 years ago.
iit
Because they're using the Japanese name for it. Most of the citizens of eastern countries use the Japanese names instead of the English names.
There is no letter 'v' in Japanese, instead 'v' is replaced by 'b'.
Well if you mean why do they say no Russian is because if they say any Russian the Russian government will know their yerrorists instead of the Americans
Because the apparent next step was an invasion the Japanese Home Islands themselves commanded by General Douglas MacArthur. (Instead, the first two nuclear weapons were used.)
"Oriental" is an outdated and often offensive term used to refer broadly to Asian cultures and people from the East. It does not specifically denote Chinese or Japanese origins. It is more respectful to use specific terms like "Chinese" or "Japanese" instead of the term "Oriental."