Why not have some real Draft Guiness and Kilkenney! I strongly recommend you this pub named Brian Brew (I'm not sure about the spelling) located in Soen in Sapporo. I'm afraid you can't expect the real British or Irish Pub cuisine there; however, the beers are obviously true Irish (unfortunately they haven't got any ciders and ales, sorry for British People) which some of you may be having from the cans now;P The prices might be half time expensive than they are in your countries, still it's a great deal I think, isn't it? Bring your JPs friends to show off the tastes of your countries while you're enjoying it yourself:)!
I'm sorry about my poor Englih. Thanks a lot for reading all. I hope you will enjoy it!
NB: This is just a "personal" advertisement for one of my favorite pubs.