Would the JR Sobu Line Rapid train to Shimbashi be a good option? Also, on the following route, there are no change of trains involved, right?: http://xs113.xs.to/xs113/07126/NRT-Shimbashi.gif

Is Conrad within a walkable distance from the Shimbashi station? If not, how much would a taxi ride cost?

How would the options compare to taking the Sobu Line to the Tokyo station + taxi to Conrad (which should be approx. 1200 JPY, right?)

Any advice would be appreciated