When a sushi spot's been rated #1 in Nikko for this long, you go in with high expectations - and somehow, Komekichi Kouzushi still manages to exceed them. Right across from Tobu Nikko Station, this place has been perfecting their craft for over 60 years, and it shows in every bite.
What makes it special isn't just the fantastic sushi (though it's definitely that), but how they weave in local specialties like yuba (tofu skin) into their menu. The tatami rooms add that perfect traditional touch, and having English menus means you don't have to play the point-and-hope game with your order.
Pro tip: While their bento boxes are great for temple-hopping tourists, it's worth sitting down for the full experience if you can. And don't skip the local sake - they know their stuff when it comes to pairing drinks with their dishes.