Simplify the following text for a Grade 9 native English-speaking person.
Original: The empress or consort to Emperor ChÅ `` ai , she also served as Regent from the time of her husband 's death in 209 until her son Emperor Å jin acceded to the throne in 269 . Up until the Meiji period , JingÅ `` was considered to have been the 15th Japanese imperial ruler , according to the traditional order of succession ; but a re-evaluation of the extant historical records caused her name to be removed from that list ; and her son , Emperor Å jin , is today considered to have been the 15th sovereign .
Simplified: JingÅ `` 's son , Emperor Å jin , is today considered to have been the 15th emperor in the order of succession .