https://www.youtube.com/watch?v=Sk-Sl8M0tTs&t=6s
This is a question I ask my Japanese-Brazilian clients, but it is true that Christian feudal lords sold young girls in their territories to Portugal in exchange for gunpowder.
I asked a Brazilian about it after reading a book by Yagiri Tomeo, and he said that it is written in detail in textbooks over there and that everyone knows about it.
I heard that beautiful children were taken in by good families and ugly children were treated as slaves.
He said that this is supported by the fact that about 20% of the Portuguese population has straight black hair.
This is a story that does not appear in Japanese history textbooks at all, but I believe that the number of people who love history will increase if they know this content.
Fado is famous in Portugal along with canzone (Italy) and chanson (France), and the melancholy songs of Amalia Rodrigues (old) and Cristina Blanco (new) are similar to the folk songs of the Amakusa region, showing the influence of ancient Japan.
The songs are very similar to the folk songs of the Amakusa region.
Perhaps Cristina Blanco has some Japanese blood running through her veins.
She may have been Naomi Chiaｋi-like atht to Portugal.
However, this intuition of mine is not found in either Wikipedia or any other encyclopedia.
Translated with www.DeepL.com/Translator (free version)