That's the beauty of Japanese sweets; they're delicious but you can't really eat too much of them in one sitting. Their snacks are dangerous though: Pocky is pretty well known and we all know that's delicious. All of their chip flavors are awesome. Honestly though, the McDonalds there was incredible. I know most people wouldn't think to hit up McDonalds in Japan but they did it right. They had teriyaki burgers and way more fish sandwich varieties. The oils taste different but above all (at least when I was there) they had special promotion burgers named after US states.
The Texax burger had bacon and chili on the burger, the Miami burger was like a taco. They were all just awesome lol