Stopped by one of the biggest Yodobashi Camera's in Osaka today from about 4:10~4:40pm. The first thing I noticed was they actually had Switch in stock!
First time seeing this since having moved to Japan a week ago. Since I had 30minutes to kill I found a nice spot near the counter so I could see what was going on and not be in the way of the massive rush of people. As soon as I looked towards the counter, I was surprised as every single person was buying a Switch. I thought they would have run out of stock already since it was already getting late, but then I noticed the clerks pull Switch's out of these:
Boxes containing 5 Switch consoles per box. There had to have been about 10+ boxes as I looked over the counter. These continued to be replenished as people kept buying with the line of people never lessening to less than 25.
After waiting for 30minutes as I continued looking back and forth from my phone, at the very least 90% of the people buying something was buying a Switch console. Pretty much every single one of those buyers got Mario Kart. Zelda and 1-2 Switch was also selling well. The occasional person got Bomberman/Puyo Puyo Tetris, and everyone seemed to be picking up a tonne of accessories for the thing.
Most of the people buying Switch were young adults and families. In terms of other hardware there were a few DQ11 3DS/PS4 preorders, but nothing else moved the entire time I was there other than Switch. Lots of kids were also picking up 3DS software like Dragon Ball or Pokemon, and the occasional person would sneak through the Swtich frenzy to buy a PS4 game.
The games with the big advertisements at the very front of this store was Nintendo Swtich with Mario Kart and Arms, and Dragon Quest (PS4 only on the big monitors). I wanted to get photos, but it was so crowded :3