Yakuta, if you look at geographical areas, you can almost always find 'fusions' of cuisine; Basque cooking, for example, is often a fusion of Italian and Spanish cooking, with its own little twists that have been added in over the centuries. Very northern Italian cooking has elements of Germanic foods; French 'provincial' foods often have more in common with their mediterranean neighbors than what we consider traditional 'french cuisine'.
For other examples, look to the Creole cuisine of the southern US - a fusion of the French and Caribbean ancestory. There's a wonderful cookbook author, Jessica Harris, who puts in amazing perspective the cooking of the Americas; from the 'slave' cuisine as it developed in the southern states, to all of the wonderful food of all the Caribbean countries, and where it came from and how it developed.
Look also to the 'fusion' of the Hawaiian foods; what a wealth of culture they've drawn on - Chinese, Japanese, Polynesion, Portuguese - to make some of the most delicious food in the world!
If you look at a map of Asia, with its countries and cuisine, you can see how foods have travelled from one country to another, with each country adapting and adopting to make it their own - take Japanese 'curry', for example!