We don't have synonyms for hirohito yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are hipolito, horopito and hirohisa.
(N) :
Hirohito (29 April 19017 January 1989), posthumously honored as Emperor Shōwa, was the 124th emperor of Japan according to the traditional order of succession, reigning from 1926 until his death in 1989.
(N) :
Hirohito posthumously Emperor Shōwa of Japan; reigned 1926 to 1989.
(N) :
Hirohito (29 April 19017 January 1989), posthumously honored as Emperor Shōwa, was the 124th emperor of Japan according to the traditional order of succession, reigning from 1926 until his death in 1989.
(N) :
Hirohito posthumously Emperor Shōwa of Japan; reigned 1926 to 1989.