maharaja - India, emperor - ?

JAPAN
List of words for the clue maharaja - India, emperor - ? from the crossword:
TSAR RUSSIA PHARAOH EGYPT MAHARAJAH SHAH QUEEN KING KHAN NERO OTHO OTTOI TITUS OTTO TRAJAN NEROS RULER OTTOIV OTTOII
WordClue
NERORoman emperor
TSARIndia - maharaja, Russia - ?
EGYPTmaharaja - India, pharaoh - ?
INDIAemperor - Japan, maharaja - ?
RUSSIAmaharaja - India, tsar - ?
TRAJANRoman emperor
EMPERORIndia - maharaja, Japan - ?
HADRIANRoman emperor
PENGUINAdelie or emperor
PHARAOHIndia - maharaja, Egypt - ?
AUGUSTUSRoman emperor
AURELIUSMarcus, Roman emperor
CALIGULARoman emperor
CLAUDIUSRoman emperor
COMMODUSRoman emperor
MAHARAJAJapan - emperor, India - ?
TIBERIUSRoman emperor
CARACALLARoman emperor
VESPASIANRoman emperor
DIOCLETIANRoman emperor
JERRY... Maguire (film)
EGYPTmaharaja - India, pharaoh - ?