Simplify the following text for a Grade 9 native English-speaking person.
Original: Other terms include `` Japanese forced occupation '' ( Hangeul : ; Ilje gangjeomgi , Hanja : æ -- å å 1\/4 å æ ) or `` Wae ( Japanese ) administration '' ( Hangeul : , Wae jeong , Hanja : ) .
Simplified: After name was `` Japanese forced occupation '' ( Hangeul : ì 1\/4 ì ê ì ê ; Ilje gangjeomgi , Hanja : æ -- å å 1\/4 å æ ) .