Complex sentence: After graduation, he taught Japanese language for four years at Tokuyama Girls’School, in what is now Shunan city, Yamaguchi prefecture, but was forced to quit over alleged improprieties with one of his students.
Split into simpler sentences: After graduation, he taught Japanese language for four years at Tokuyama Girls' School, in what is now Shunan city, Yamaguchi prefecture. He was forced to quit over alleged improprieties with one of his students.