That's only because Japan needed to be in the game on the Nintendo console version, for some reason.

Personally I'd still rather Shaka and the Zulu than Mandela with South Africa, but wouldn't mind both in a future game as long as we get to like 70 civs.
the more civs the better, lol. There’s a lot of civ’s I’d like to see ahead of South Africa unless it’s replacing Zulu though.
A more thematic replacement for the Zulu would be the Swazi, as the swazi kingdom was a huge conquering nation in southern africa (it completely defeated the Rosvi Shona kingdom, for example).
But I’d like to see a whole ton of civ’s before South Africa if it isn’t being introduced to be a civ replacement for the Zulu—in just Africa, the Berbers, Morocco, Swazi, Swahili, Shona, Madagascar, Ndongo/Angola, Benin, Ashanti, Burkina Faso (I really want to see Thomas Sankara, lmao—if y’all want to meme in a civ again, let it be this one), even the Songhai or Ghana, even though those have geographical and some thematic overlap with Mali.
Outside of Africa, I’m a big fan of introducing the Guarani, Purépecha, Muisca, Argentina, Tlingit, Haida, Coast Salish, Navajo, Ireland, Burma, Champa, Chola, Mughals, Gupta, Rajputs, Kazakhs, Sogdia, Kushans, Ghaznavids, Timurids, Babylon, Assyria, Elam, Hittites, Armenia, Sapmi, Austria, Byzantines, Kievan Rus, Jurchen, Uzbeks, Malacca, Hawaii, Tonga and that Siberian civ
@Zaarin was talking about the other day
that’s 46 more civs lol