It is clear from the contexts in which the terms appear that these terms were thought of as jocularisms from the British perspective, again demonstrating the power imbalance of the era.
The animation may have improved, but the essence, the heart, the quintessentialness of anime and manga, is gone. The creators are just pandering to their audience.
Albeit, at the time, the Type 93 would go on to be the central star of the most spectacular teamkill of the war, when the cruiser Mogami fired a salvo of six Type 93s at the cruiser USS Houston, missed, but, with their long range, the torpedoes quite happily motored on and blew up four friendly transports and a minesweeper. Yeah, not such a good day.
Again following [Walter Garrison] Runciman, whether we agree with the biological race concept or not, its continued formal and informal salience confirms that competing racial understandings exist irregardless of whether they are valid truths or subjective speculations.