YOU SAID:
Takeshi's friend's major is history.
INTO JAPANESE
タケシさんの友人の専攻は歴史です。
BACK INTO ENGLISH
Majors's Takeshi's friend is history.
INTO JAPANESE
メジャーのタケシさんの友人は、歴史です。
BACK INTO ENGLISH
Majors's Takeshi's friend is history.
That didn't even make that much sense in English.