What Omakase lunch/Dinner does not break the bank?

I will be visiting Japan with my friends in early march. We are third world country budget travelers and cannot be comfortable converting to USD/Euro in mind and spend for our country is way cheaper to live and currency is weak. Can you please suggest cheap Omakase places that wont break the bank? Tokyo/Osaka/Kyoto/Kanazawa is ok. I just want to experience how Omakase is different from the regular izakaya or QSR Sushi like Kura sushi.