Switch is short supplied in Japan by a good amount compared to previous weeks. It's kind of weird that the rest of the world seems to still have enough stock that it isn't affected. I am looking at Amazon right now in the US and I can buy a Switch for $385 or I can actually get it from Amazon for $300 if I am willing to wait a month. Maybe physical retailers actually have stock though?
Japan must have ever worse stock issues than that if it seriously dropped in sales this week.