It's nice to have a small Japanese market in Henderson where I can grab some Japanese foods without having to drive so far to Spring Mountain.
They have a great selection of snack and candies (including the various flavors of kit kats) if that's what you're looking for, but they also carry seasonal fruits/veges like persimmons in the fall. They also have a little area near the front where you can grab some breads (akin to milk bread but not quite), pastries, and prepackaged meals.
Additionally, they have small housewares near the back if you're in need of chopsticks, small bowls, ladles, etc.
Overall, it's a nice, small market in Henderson for Japanese foods/goodies. It's obviously not as extensive as Mitsuwa in California, but it'll do the job. I don't think I'ver ever bought anything from there that disappointed me. Everything tasted great!