The current emperor , Akihito , has two sons : Crown Prince Naruhito and Prince Akishino ; Prince Akishino is the father of the Emperor 's only grandson , Prince Hisahito .
Head entity: prince hisahito Q844333 29 30
Tail entity: prince akishino Q311174 14 15 17 18
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P22