Some years back I actually mongered in Kawasaki (it's about 45 to an hour high speed train ride from Tokyo), supposedly home of the OG Nuru massage. If you watch those Japanese adult videos that feature this, it is kind of close. The chick bathes you / scrubs you down, then they take out this inflatable mattress that looks like a float with ridges (it's comfortable to lie down in) and make it a bit slippery. There's oil on the girl and you (and depending on how much) prior to the fun, and the girl massages your front and back with her whole body, and you can also get a cat bath prior to the action (you can choose on that inflatable float or somewhere else). That is the true Nuru experience. Not a cheap endeavor by any means and I think we have it better here in terms of value (overall K gals are better than the blue collar J gals I was with those times).