While the form of Japanese spoken in Tokyo is a “standard” dialect that can be found in use throughout the country, many regions of Japan have dialects that are unique to that region. Osakans speak their own dialect called “Osaka-ben”. “Osaka-ben” is highlighted by words and phrases that have special meanings found only in the Kansai area.
Ookini（おおきに）
This commonly used word has the meaning of “thank you” in English or “arigato” in standard Japanese. Many Osakans say ookini at the end of whatever they say to smooth relations with the person on the other end of the conversation. In such cases, ookini means either “thank you” or “please.”
Ookini was originally an adverb that indicated quantity. Therefore, “ookini arigato” is the equivalent of “thank you very much.” Over the years, this was abbreviated to just “ookini.” It is also a casual way to show appreciation as in “Ookini gochisosan” when someone treats you to a meal and a way to ask for forgiveness. “Ookini sumahen” apologizes for a mistake or troublesome behavior. Osakans will even use this almighty word to say “no thank you,” as in “ookini, kangaetokimassu.” Although it may appear that the speaker will give your proposal consideration, he or she is actually giving you the brush off.