Justin, yes. (The legend isn't long enough for Justinian.)
This type is said to exist for Justinian, but despite a lot of googling, I was unable to find a plausibly attributed example.
This type does, however, exist for the brief joint reign of Justin and Justinian, with both heads on the obverse; that is a coin that I want to acquire some day.
(It is also one of the many contenders for the title of "last pagan Roman coin".)