emperor - Japan, pharaoh - ?

EGYPT
List of words for the clue emperor - Japan, pharaoh - ? from the crossword:
NERO TUT RAMSES ANT OTHO OTTOI TSAR RULER TITUS SETI KHUFU ENTOMB CHEOPS OTTO UNAS TOMB SWAYER RAMESES AIDA
WordClue
ANTpharaoh or legionary
NERORoman emperor
TSARJapan - emperor, Russia - ?
INDIAemperor - Japan, maharaja - ?
JAPANpharaoh - Egypt, emperor - ?
KHUFUname of pharaoh
DJOSERname of pharaoh
KHAFREname of pharaoh
RAMSESname of pharaoh
RUSSIAemperor - Japan, tsar - ?
EMPEROREgypt - pharaoh, Japan - ?
PHARAOHJapan - emperor, Egypt - ?
MAHARAJAJapan - emperor, India - ?
THUTMOSEname of pharaoh
AKHENATENname of pharaoh
AMENHOTEPname of pharaoh
VESPASIANRoman emperor
DIOCLETIANRoman emperor
HATSHEPSUTname of pharaoh
TUTANKHAMUNname of pharaoh
INDIAemperor - Japan, maharaja - ?
RUSSIAemperor - Japan, tsar - ?