Following two are my favorite Japanese restauraunts out there in the 'urbs. Sakura is more well known among the general public, Kurumaya is still a bit of a "hidden" gem...
Sakura Restaurant Woodfield
4011 Algonquin Rd
Rolling Meadows, IL 60008
(847) 397-2166
Cross Street: Route 53
Kurumaya
1201 E Higgins Rd
Elk Grove Vlg, IL 60007-1600
(847) 437-2222