Japan should have a few more. After Europeans came it went through some dynamic situations
Japan-Kamakura: Vassalage (Ancient, Classica, Feudal and Early Sengoku ages)
Japan-Tokugowa: Caste System or Mercantilism (Late Sengoku and Tokugowa Age)
Japan-Meiji: Theocracy (Meiji Restoration age)
Japan-Showa: Pacifism
I had thought to add:
Japan-Fujiwara: Mercantilism (for Ancient & Classical ages) to represent the more isolationist policy, but Japan already would have 4 leaders with this, more than some larger civs.
Tokugowa: Both represent appropriate aspects. Caste system does better since Japan did still trade somewhat, however Caste System allows scientists which is not what happened in this era.
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Turkey-Mustafa: Representation (End of Ottoman Empire)
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Vikings: Sorry, emancipation is not what they should have. They captured others to make slaves, not those born as a Viking.
Viking-Lief: Nationhood
Viking-Canute: Free Market
Lief is used as one of the more world-reknown vikings. This would be early era exapansionist, pludering vikings. Canute represents the age after great pluderings.
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Carthage: Free Market. They were the trade empire before Rome took them out. Only though if they can actually achieve the prereq.
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Portugal-Garcia: Nationhood
Portugal-Henry: Mercantilism
Portugal-Salazar: Representation
Each of these represents 4 major points of Portugese history as best as the Civis allow. Nationhood is when they were still fighting to establish their right to exist against Spain and Moors, Mercanltiism is when they began to discover and become an empire. Portugal Charles represents the period of modern portugal (save for Charles monarchy) in the aftermath of their crumbling empire.
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Spain-Alfonso: Herditary Rule
Spain-Isabel: Organised Religion
or Theocracy
Spain-Phillip: Theocracy
Alfonoso represents the Castiltian timeperiod during which time, like Portugal, Castile had to fight a lot of the time for it's right to exist. Isabel represents the formation of Spain itself and more stable period. Both OR and Theocracy are appropriate for this era, so not sure which is best. They wanted to have tight control on religion, but at the same time, they also wanted to spread it easily to pagans.
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Egypt-Fatimid: Theocracy
After arab conquest, incase eqypt survives it has a more representative civic.
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USA-Washington: Representation
USA-Lincoln: Emancipation
USA-Rosevelt: Nationhood or Bureaucracy
USA-Eisenhower: Free Market
Washington is fine. Lincoln is known for Emancipation, even though nationhood would be better. Rosevelt (I assume you mean Franklin) was known for wartime efforts and Great deal to bring the USA out of the Great Depression. Eisenhower is best to counterbalance Stalin which is what the Cold War was based upon, at least superficially. If you mean Theodore Rosevelt, then Environmentalism should be used, though it's not appropriate really for his reasonings.