That region is not "central asia". It is called "Turkistan". They eat similar food and speak very close language because all (except Tajikistan) are Turks. Get your stuff right, Japan.
@otsukarci Hum... Then Wikipedia is also wrong. Like:
"Turkestan, also spelled Turkistan (Persian: ترکستان, romanized: Torkestân, lit. 'Land of the Turks'), refers to a historical region in Central Asia..."