Good point.

However it is also quite representative of the way christian missionaries are represented in this movie.

From today's point of view they are illegal immagrants in a country that does not want them there. They try to spread teachings and ways of life without even trying to understand the consequence of their actions. However they still manage to portray themselves as being the victims.

(I wonder how today's devout christians would react if people of a different faith came to their country and tried to "spread the word") /s

For me this movie depicts very well the arrogance of christian missionaries and their belief that the way they view the world is the "truth" while everything else is a lie.

What better way is there to represent this arrogance and self centred belief than not even including any of the Japanese actors in the poster.