"Meiji era" or "Meiji Era"?

[Guinevere]

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Which capitalization is correct, "Meiji era" or "Meiji Era"?

[Haihao]

I think it should be "Meiji Era" or "Meiji Period". By the way, in my opinion, capitalization is supposed to apply to a single or independent word and "Meiji Era" is a two-word phrase, so each constituent word should be capitalized separately.