If you are at MK or AK, you can take a bus to the Swan. It's in the Swan. (How you get there depends on how you enter the resort, so ask when you enter.) If you are at MGM or Epcot you can take a boat. If you don't want to take the boat, you can also walk. The boat leaves from the International Gateway (the far side of Epcot). From MGM, the boat ramp is on the left as you exit the park, down by the water. The opposite from where the bus stops are located. We usualy walk from Epcot, but take the boat from MGM, as it's less scenic. If you are leaving from your resort, probably the fastest thing would be to go to the bus area of MK and take the Swan bus from there. If you take the Epcot monorail from TTC it will drop you off on the wrong end of Epcot. I'm pretty sure Kimonos is only open for dinner, though I think it's open fairly late. To get back to your resort, if it's not too late, you could go via MK, or DTD if it is late, or take a taxi.
We like Kimonos too, though it isn't super-inexpensive by our standards.