82 Ale House
Note that last orders are at the bizarrely early time of 10:45PM on Saturdays and Sundays
Leaving Shinagawa station via the Konan exit, go down the escalator and walk down the street directly in front. Its near the end on the right hand side
Very convincing Victorian style British pub. Largish drinks menu which includes single malt wiskeys, real ale and Guinness on tap for ¥900 a pint.