mostly casue the very low attach ratio in japan specifically, where there is a high phisical attatch ratio AND the cheapest place to buy the console, means that its very likely that a LOT of the consoles sold in japan are actually resold overseas.

plus, we are still in year 1, meaning its still early adopter boom stage so far.

We can derive from first year sales of the Vita and the PS4 that less than a million Japanese gamers would have wanted a PS5 during year 1, based on the PS5 lineup not being any more appealing than its predecessor's. If Japanese gamers were truly interested in the PS5, then there would be more effort from their side to get one and more effort from retailers to sell to Japanese gamers, because that way the retailers could sell games too.

We know that PS5's bought in Japan are exported afterwards, so it should go without saying that numbers from lotteries are inflated too.

You misunderstood my post. Too low supply in countries with actually high demand for the PS5 has resulted in PS5 consoles being bought in Japan for the sole purpose of being exported into countries where people want to own them (primarily mainland Asia and South America). This is why PS5 hardware and PS5 software sales in Japan are so out of sync with each other.

The situation is going to come to an end by either global demand being met or Sony stopping to ship more PS5s to Japan than there's demand for them among Japanese gamers. Due to the chip shortages the latter is more likely to happen sooner.