An as of yet untested sex act in which the perpetrator, whilst being fellated by the victim, screams "BANZAI!!!!!" and rips a deafening (preferably wet) fart directly in the face of said victim. Extra points are awarded if victim is either drunk from excessive saki or is somehow dressed as a geisha.
"I no longer have a girlfriend after our night in Tokyo ended with a Japanese War Tuba at the hotel."
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A sexual move in which a man's limbs are bent in every which way until he resembles a human pretzel (they may break), and the woman puts her mouth around his dick (like one would a mouthpiece) and blows. This will tickle the man, and will make him giggle like a japanese schoolgirl
"Last night was the best. I got a the japanese tuba from this buff russian lady and I had to go to the hospital afterwards ."