Take them to Chicago's finest glatt kosher restaurant, that way you can eat with them rather than just staring hungrily at their delicious manflesh like last time.

Chicago's finest kosher restaurants are not all that great.  Other meat restaurants won't have kosher options, but I can just have a water or something.

I would just make a reservation at a nice deep dish pizza place.  I mean, whether or not they like it (asians don't seem to like cheese as much as us midwestern americans) they can still go home and say they had a big Chicago pizza, right? 

IDK about gifts.  If you get a souvenir-esque thing make it something you or I would find insultingly obvious, like, if it were at all possible, tommy guns because the rest of the world still knows this place for Al Capone, apparently. 

First, do not give Johnny Walker.  The Japanese produce their own Scotch which rivals some of the best out there so make it the real deal if you go down that road.  Maybe something more American like Bourbon.  Talk to CT about choice Bourbons or some unique micro brews.

The thing about being American and giving gifts from other countries kind of says to them America has nothing to offer itself.  Diplomacy is warfare disguised and often these sorts of exchanges are really just passive aggressive cultural dick measuring contests.  Sure the Japanese want to come and have a good time but there is always a cultural barometer in play.

Go steakhouse rather than upscale Michelin.  Tokyo has more Michelin restaurants per capita than any other city in the world including Paris.  American beef still rules, the Wagyu they eat in Japan comes from the US, largely California.  Their own cattle are grown here because it's cheaper and we have the land to do it.  Our real Prime, dry aged, corn fed beef is still tops in the world regardless of any Argentine grass-fed stuff which is something different altogether and never aged.  We also have Bison and Buffalo steaks which are phenomenal. 

Have a look at http://davidburkesprimehouse.com/About.aspx . They have an aging room with walls made of pink Himalayan Sea Salt (from when there used to be an ocean there).  It flavors and seasons the meat w/ a unique taste while controlling any bacteria during the aging process.  They have lamb, chicken and pasta so you should be fine.

So they are Japanese that don't like Baseball.  That's tough.  Give them lots of porn full of Scandinavian blondes.

I'd say Anax has got it right. I'd say find a popular local cuisine but not pizza for God's sake!

Also take note that Japanese folks in general don't eat large portions nor are they wasteful. i.e. don't take them to places that has the largest steaks. They'll struggle & feel obliged to finish & probably may not enjoy by the 400th gram. This is where IMHO expensive fine dining that leaves a Westerner still hungry even after an 8 course finger meal would probably work well for them.

As for drinks, I think Japanese like their fine liquor. Personally I would have gone for wine rather than whiskey. Although they do import very good wines from overseas to Japan, their local wine produce is "so so".

As for a gift, I'm surprised they didn't know baseball. They should since its so big here! Maybe an autographed American football instead. If they're not going to know at least something completely off may be better.

Arnaud's probably thinking I'm spouting crap now :-).