This criticism had already been made of Claringbould's work, and I think the same problem appears in many works on this period.
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Gary Connor
The problem is mainly caused by comparing selected losses and claims from IJNAF forces with the total losses and claims of all Allied forces in a theatre. This can make it look as though "
Allied victory claims are wildly exaggerated, while Japanese claims are merely inaccurate".
I should admit that I am no expert on the history of the Central Pacific around 1943, but I can offer some examples from Umemoto's
Kaigun Zero-sentai Gekitsui Sentōki where he mostly counting losses & claims from
201st, 204th and 253rd Kokutai. (Umemoto's statistics may have influenced Claringbould's narrative, as his work published after Umemoto's.) A good example would be, on July 2, 1943, a joint operation was carried out to bomb Allied installations. Umemoto described the result as one Allied Corsair lost and two more forced to land, with no Japanese losses, and concluded that the exchange was "1:0." However, IJAAF Ki-61s and Ki-43s also took part, and at least three Ki-61s failed to return. These losses were not included in Umemoto's account.
The same series offers another clear example of mixed categories. On July 18, it gives the exchange as "11:3," listing eleven American aircraft losses against three Japanese pilot fatalities. Three dead pilots do not establish that only three Japanese aircraft were lost, yet the figures were used to draw an exchange ratio.
A similar problem appears in the account of March 19, 1945. The 343rd Kokutai has been credited with a 15:14 exchange ratio, but this leaves out IJAAF losses that day, including at least three Ki-43s and one Ki-84 reportedly shot down near Matsuyama. Other IJN and IJA units fighting near Kure were also not included, as well as those been strafed on the ground. Meanwhile, the U.S. Navy loss figure of fourteen included six aircraft lost after ditching or being damaged beyond repair. Those "selected Japanese losses" makes the USN claim of 50 looks like extremely exaggrated, and was clearly a way to doctor figure toward the Japanese side.
It should also be noted that the IJAAF itself acknowledged that its aircraft-loss records had been purposely destroyed by the order from IJAAF generals before the end of the war. As a result, the exact number of Japanese aircraft losses in each combat, especially the IJAAF forces, became difficult to establish and reconstruct, and researchers may find it easier to count pilot losses.
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