Kuru-Kuru Zushii was relatively inexpensive -- two pieces of tamago were only 50Y, and the most expensive was the real crab meat at 250Y. There were little spigots every few seats, and these dispensed ocha (very, very hot ocha). I sure miss that place. I wonder if there's a market for that out here . . .
I've only visited Japan twice, but would like to do so again (and again)... BTW, I didn't buy the $200 fugu meal for myself - I was treated by the company that I was visiting (I had given a one hour presentation about software that I had co-developed)...