Simplify the following text for a Grade 11 native English-speaking person.
Original: RichÅ `` is venerated at a memorial Shinto shrine ( misasagi ) which is associated with the burial mound .
Simplified: The actual site of RichÅ `` 's grave is not known . This emperor is traditionally venerated at a memorial Shinto shrine ( misasagi ) in Sakai , Osaka .