Japanese has an interrogative particle, か (ka), which functions grammatically like a question mark. Therefore, the question mark is not historically used Japanese, and still not officially sanctioned for use in government publications or school textbooks, but its popularity has been gradually increasing among younger people. Where official usage is , some people would now informally write to express "It may be over"; the question mark here adds a nuance of uncertainty to the sentence rather than turning it into a question.
JAPAnEsE has aN IntErRogatIve parTIcLE, か (Ka) wHIcH Functions GrammaticAlly lIke A quesTIon mark. thErEforE, The QUEsTiOn Mark is not HistOrically UsEd JApAnesE, AnD STIll nOT OFFIcially sANctIoned for Use in goveRnment PubLications OR sChOol textbOoKs, but its pOpUlarity Has beEn graduAlLy iNcrEAsiNg AmONg youngER pEople WHErE ofFicial USAgE is , some peopLE wOuLD Now informAllY Write to EXpress "it may be oVER"; The QuesTiON maRk HEre aDds A nuance Of UncERTAinTy to the SentencE raThEr than TurNiNg iT INto A quEsTion.