Ahh, the
Kaigun's admiration of the Royal Navy, even when it was their enemy, strikes again!
A practical look at ship's design. Most Japanese carriers sunk from air attack, and an armoured deck might increase the chances of survival, or so they thought, as Taiho herself sunk by a submarine torpedo. Japanese carriers were very lacking in the protection of aviation fuel, and the fuel lines, and this IMHO was the main reason for the carriers losses.
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Thank you Kim for the crest
"Never fear to try on something new. Remember that the Titanic was built by professionals, and the Ark by an amateur"