Japanese Curry Zen is one of my favorite comfort food spots. I used to come here often when I worked on the strip, but now that our office has moved further east, it is now even that much more of an effort to get to Chinatown area and all of its great food. I guess you could say that it is not really that much of a drive from Henderson, but I digress...
I typically get the pork katsu curry with shrimp. Which doesn't seem like much, but that rice is really filling and pairs oh so well with the curry. Sometimes I don't get how something like plain rice can be so good when eaten with other foods. It just tastes like home.
On the spice level - I typically get level 1 which is perfect for me because I really don't do well with even slightly spicy things.