I would say that any kind of Banzai charge would be historical incorrect, but Slave Labor would be historical correct. From a military standpoint, a mass suicide or banzai charge is about the most certain form of failure on the post-rifle battlefield. Banzai charges were actually something the Japanese launched as a last resort, something of “all in”! I would say it is a defensive NA and thats why I rolls the banzai and dug-in defenders into one concept of a defensive NA, Fanatic Resistance.
Obviously, the Japanese were not going to win in the Allied manner of outproducing the enemy, so they were going to have to win against the odds. Japanese religion guaranteed that the Japanese were going to win, if they persisted, so the Japanese looked at ways of using willpower against the decadent Westerners. The most obviously futile method was the banzai charge, in which a Japanese unit would charge en masse, yelling fierce battle cries, against the Americans. The usual American response was to shoot at the Japanese with everything they had, and the usual result was that the Americans were frightened for an hour or so and the Japanese were dead!
Most Japanese soldiers were willing to do their utmost and achieve their objective or die trying. Most officers were unable to distinguish between attainable and unattainable objectives, and sentenced their men to die trying the banzai. This kind of banzai charge did mostly end tragic and unsuccessful! Granted, the outcome was really never in question, with the benefit of hindsight.