Database: university
Question: Calculate the difference between the total number of students and the number of international international students in Univeristy of Tokyo from 2011 to 2014.
SQL: SELECT SUM(T1.num_students) - SUM(CAST(T1.num_students * T1.pct_international_students AS REAL) / 100) FROM university_year AS T1 INNER JOIN university AS T2 ON T1.university_id = T2.id WHERE T1.year BETWEEN 2011 AND 2014 AND T2.university_name = 'University of Tokyo'