1. I'm not quite sure that your point is in emphasising that some Zeroes lost to Seafires were kamikazes. Fighter vs fighter combat may get a lot of the glamour and glory, but splashing kamikazes before they hit the ships was a far more valuable and important job, and if the Seafire had not had a performance advantage, it could not have caught them.
2. IJN records of aircraft lost not according with FAA kill records; well yes, we've been here before. But if I had to trust one or the other, I'd tend to trust the FAA.
3. By the end of the war the IJN was in pretty complete disarray. From other documents I've seen, their "official view" was also pretty completely divorced from reality…..
4. Secondly, as I've pointed out twice already in this thread, if we are to take the position that a kill is only considered valid if it is confirmed by the records of both sides, and if we are to be consistent, then we have to revise every successful fighter pilots' total; Hartmann, Kojedub, Bong, Johnson, the whole lot of them. Let's not go there. That's not a sensible position to take by any standards.
5. As for whether details of aircraft performance are important in understanding what went on; of course they are not the only thing that's important. That's obvious. There was a lot more besides; tactics, pilots, training, leadership, morale, maintenance standards, etc etc.
6. As for speed being the most important performance variable; sorry, I'm not convinced.
1. It's not the downing kamikazes (or bombers, or transports for that matter if that was the key target at a particular moment) was unimportant, it's that the exchange ratio between the attacking fighters and those targets isn't meaningful, can't be compared to exchange ratio's of true fighter combat. The Seafire may have been an effective kamikaze interceptor but that ratio isn't really relevant to that. As already stated, the FM-2 fulfilled a similar mission to the Seafire in '45 and had a considerably higher exchange ratio (against fighter types), does that mean its performance was better for catching kamikazes?, no the exchange ratio is just not relevant to that. Exchange ratio is a relevant measure (though still not the only one) for true fighter-fighter combat.
2. Anyone who takes *any air arm's* WWII claims at face value of discounted 'a bit' and ignores evidence of opposing losses (with excuses of course) is just kidding themselves and creating a fantasy world of air combat analysis. It's been done for years, but still leads to contradictory, and wrong, conclusions (the great majority of WWII fighter types claimed ratio's >1 against opposing fighters, I guess they were all successful?; all our children are above average, it's about the same thing but less reason for mushy analysis of fighters than children

).
3. What specific case can you give where losses in Japanese (or anybody else's actually) records are understated, evidence besides the opposing claims being higher? Allied losses were much less than Japanese claims, and often much less than German claims (though not always in latter case) too, why doesn't that call Allied loss records into question? The system of govt strictly dictated the accuracy of loss records? That's not a serious argument IMO. It needs at least some date by date specific evidence.
We saw in Darwin 1943 case that the complete 'kodochosho', original action reports, of the 202nd Air Group survived; numerous accounts of theirs say it was the only Zero unit involved. They showed 4 Zero losses in the whole campaign, with the names of the pilots lost, and names of the other pilots on the missions. The Spits were credited with several times that many Zeroes. But no evidence of wrecks, bodies or POW's challenges any of the results of individual missions described in the Japanese reports. What objective basis is there to reject those Japanese accounts?, talking about 'Tojo' and 'saving face', 'proof' via cultural sterotype

? Denying the light Zero losses over Darwin and high overclaims by the Spits there is 'denial' in the pejorative sense, no way around it.
And there's no reason to disbelieve the Seafires claimed 7 Zeroes August 15 '45 but only downed 1, considering innumerable examples of overclaims as great in combats throughout WWII by all air arms including British. There is more doubt in that case, for the reasons I already gave, the same Japanese were also engaging F6F's that morning and attributed a bunch more losses to them, there could have been some mix ups, and the greater vagaries of 'losses' suffered over own territory (do wheels up landings count? etc). But saying it was 7 or 'a bit less' is a pseudo-fact. No valid conclusion can be drawn from such as assumption. It's just assuming the conclusion you want.
4. You're essentially saying we have to ignore a clear fact, that claims (or official victory credits) in WWII fighter combat exceeded actual opposing losses, often by a lot, because it would cause what you consider to be an awkward situation. *That's* not a serious position.
Anyway individual scores and overall results aren't the same thing. In many cases we reasonably surely know, eg. 5 a/c were credited but only 1 or 2 really downed, but we seldom know which of the 5 credits actually represent those 2 losses. There's anyway no imperative to restate individual scores, we simply have to keep in mind the real scores were almost always lower, and more importantly we have to fairly consider who's score was amassed in air arms and situation where the claiming was more or less accurate. That's the other key concept which keeps getting ignored, 'overclaim' is not some constant which we can factor out across the board and then ignore, it varied *a lot* from air arm to air arm, unit to unit in different situations and campaigns in WWII.
5. I agree, but the bulk of the thread is about about performance stats. Or, non-accurate approaches like drawing conclusions about fighter effectiveness from the absolute level of a *claimed* ratio that was possibly mostly against fighter types acting as kamikazes.
6. I just gave speed as example. My point is we can say the faster plane is superior if equal in all other respects, *or* the better climbing plane is superior if equal in all other respects, *or* etc, but once we have planes where one is a bit faster but the other climbs a bit better or etc., there's no solid analytical framework to resolve that into which plane was better based on stats. And that's usually the case between any two planes close enough in performance to even have to debate which would be more effective in the hands of equal pilots.
Joe