i'm not sure if you can find curry in the japanese restaurants in the city, which are designed to cater to non-japanese crowds (who are more likely to be drawn to sushi and teriyaki when it comes japanese food). you will have morel luck finding home-style food (like curry) in the northwest suburbs. i know for sure that Sakura and the food courts at Mitsuwa and Tensuke have curry. i think you might also have luck at Daruma Restaurant and izakaya like Sankyu or Kurumaya. good luck!