Anjin,

50 million seems unlikely mate....
That would mean almost 1 million per "province" or area...

perhaps 15 million?? Or, as you said it could be artistic liscense. Or, it could just be to show the inaccuracies of the Portugese data.

But, just from a growth curve perspective... 50 million, and Japan now a days is about 125million. it seems unlikely that the population would barely double in 400 years... especially when you consider that the population of the world doubled around twice in the 20th c.

-Zen Blade

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Zen Blade Asai
Red Devil
Last of the RSG
Clan Tenki Council-Unity