I'll eat the raw beef dipped in their sauce but I am not that brave for their raw chicken in the sauce.
(Tl;dr at end*)
While I still agree with never taking a chance with raw chicken, it wasn't until I read back on one of the TLs— though, I can't remember which chapter now this TLnote was on— that Japan has strict regulations regarding their chickens, including vaccinating their chickens for salmonella. It doesn't mean there's a zero chance of getting salmonella, but at least it alleviates worries in most people there. This standard, as well as having vaccinated their chickens for generations (of the chickens), is likely why Japan has confidence in serving raw eggs and raw-inside, seared-outside chicken.
Other places, like the US, find that kind of care for vaccinating their chickens over generations is too expensive and too much of a burden on the farmers (though company PR-reps are more concerned about the former reason). Places like the US have come a long way with lessening the cost of their cleaning methods and refrigeration, which does increase the shelf lives of the eggs, so there's no need for them to invest into that market. Lastly, even if there was a small farm or coalition of farms in a western country that wanted to follow the standards of Japan's eggs, there is still the stigma associated with eating raw eggs and chicken. To account for that wariness, those eggs and chickens would likely have their prices raised to market them as a luxury product; that being said, the moment anyone gets sick from a raw egg or chicken, the faith in that seller could be shattered.
*Tl;dr
Japan vaccinates all their chickens and strictly regulates their eggs, which means they're safer to eat raw than other places, but not a zero-chance. A chance I won't take with raw chicken.