The student front row center white shirt black leggings is Esat Sezgen. 

 I believe this is in Pusan, Korea. 

ABOVE: top left - Tokyo Mosque - built 1938

bottom left - Tatars of Pusan - Korea

top right - Tokyo Tatars 1929

bottom right - Harbin School - 1924

ABOVE: Kobe Japan Tatar Community 1953

Upon receiving Turkish Citizenship

Photo taken in the yard of the Tatar School / next to Mosque

After the war.

Tatar ladies of Kobe Japan

left - Tatars in front of Tatar school - Hailar China

center- Tatars of Kobe Japan

right - Tatars in front of  Tokyo Japan Tatar school -1929

Fuat Sadri of Kobe Japan uses a baseball bat at San Francisco Sabantuy 1976.  This is at Searsville Lake which is in the hills above the Silicon Valley.  The gentleman on the right, pointing down is Tahir Devletsah, born in Korea.  These are all Tatars that comfortably spoke the Tatar language.  They are both deceased.

This image is from the collection of Remziye Devletsah 

On the reverse is written "Pusan 1949"