Had akiyama not been a ethnic Korean born in Japan. He would have made many olympic national teams. The guy is an Asian games judo gold medalist.
A long time lurker here, but I decided to post, because you seem to be repeating Akiyama's one-sided - and frankly deceitful - claims, and those claims do a great disservice to Korean judo, to competitors who legitimately beat him, and ultimately to truth. To be straightforward: Akiyama failed to consistently make the South Korean national team, simply because he was not good enough to consistently make the team. As a South Korean national and someone who knows the local judo scene very well, I hope I can clarify the matters a bit.
First, the context: South Korea in recent years - obviously along with Japan - has been arguably one of the two strongest judo powerhouses in the world except at the higher weights (where Europeans tend to do better due in large part to physical superiority). As a result, making the national team is not exactly easy. As I explained to a friend a long time ago, when Yoon Dong-sik went around making similar claims about being jobbed by local judo politics: Representing South Korea or Japan in judo is akin to representing Brazil in soccer. That is, you can be among the best in the world and still not come remotely close to making the team. Remember how Deco - one-time UEFA club player of the year - had to settle with playing for Portugal, because Brazil already had Rivaldo and Ronaldinho among attacking midfielders? Likewise, in judo you can be literally the 2nd best competitor in the world at your weight and rarely make the South Korean or Japanese national team, because the guy in front of you happens to be the best in the world. In fact, in some cases, the top 3 competitors in the world in a given weight could be Koreans (or Japanese), and the 3rd best competitor in the world would not even have any hope of making the national team, barring a chain of lucky events.
Let me give you one well-known recent example where the scenario I sketched above actually occurred. Lee Won-hee arguably had the most dominant one year or so stretch in world competitive judo history when he won 40-plus matches in a row by ippon and won the 2004 Olympic Gold in a dominant fashion. The expectation in the judo world, given Lee's seeming invincibility then, was that Lee would replace Jeon Ki-young as the greatest Korean judoka ever and rule the weight for at least another half a decade. Yet, he pretty much disappeared from international competition soon after and failed to make the 2008 Olympic team - which prompted casual judo fans, especially those in Korea, to wonder whether Lee was unfairly kept from the national team. But nothing of the nature occurred. In truth, Lee continuously kept losing to Wang Ki-chun, the boy prodigy, who won his first world title at 19 and would've likely won the 2008 Olympic Gold had he not broken his ribs.
Still more remarkable, Lee Won-hee was not the only Olympic Gold medalist and world champion kept from the national team by Wang's brilliance. Kim Jae-bum - who was also a future Olympic Gold medalist and two-time world champion - could not make the team either, because he, too, kept losing to Wang. Indeed, Kim only started to make the national team when he moved up in weight - and he began to dominate the world stage as thoroughly as Wang did once he did move up.
(As a corollary, when Song Dae-nam - a complete unknown at the world stage - won the 2012 Olympic Gold at age 33, people wondered where he came from and automatically assumed that he, too, had been kept from the national team unfairly. But again, the truth was more mundane: Song couldn't make the team because he - you guessed it! - could not beat Kim Jae-bum, and he could only make the team by moving up in weight!)
So in essence South Korea had arguably the top 3 competitors in the world at the same weight in the mid-2000s - and all of them would win either multiple world titles or a world title plus an Olympic gold. So being a one-time winner in Asian Games - which frankly is way down in prestige relative to Olympics or the world championships - does not automatically mean you are good enough to consistently make the national team. In fact, making the South Korean or the Japanese team is harder than winning a gold at the Asian Games most of the time in terms of the competition you have to beat. To win an Asian games gold, you likely have to beat one wold class competitor at most (South Korean, if you are Japanese; and Japanese, if you are South Korean), whereas you have to beat multiple world class competitors to make the national team.
Now, let us return to Akiyama's situation. The weight that Akiyama competed at was not only a loaded weight simply because the scene is South Korea, but it had arguably been the most competitive weight in South Korean judo history for a decade. Earlier in the 1990s, you had three competitors who were likely among the top 4 or 5 competitors in the world - the best among them being Jeon Ki-young, who won three consecutive world titles and an Olympic gold, and who is universally considered the greatest Korean judoka ever. And yes, Yoon Dong-sik - who was unfortunately only the 2nd best competitor in the world at this weight then - had trouble making the national team for important meets, because of Jeon. Now move forward another half decade to late 1990s, when Akiyama entered the South Korean judo scene from Pusan. Jeon was long retired, but Yoon was still around. Moreover, Cho In-chul - two-time world champion who should've won the Gold when he lost arguably unfairly to Koga (who is one of the greatest Japanese judokas ever and up there with Jeon among the greatest of this generation) - had arguably surpassed Yoon.
So Akiyama was at best the third best competitor in the Korean scene at this time; it is not surprising then that Akiyama could not crack through. He wasn't better than Yoon, and he wasn't better than Cho, when he came on the scene. And once Yoon moved up in weight and Cho faded due to age, Akiyama did make the national team and had mixed results - winning the Asian games, but also failing to medal at the world championship and ignominiously being disqualified through cheating (a common theme in his career).
TLDR: Akiyama was very good. He was likely a top 10 judoka in the world in his prime. But to make the South Korean national team at his weight, he would have needed to be top 1-2, and that he was not. As a result, he seldom made the team. As simple as that.