you see china weapons and a china map and then you say the last days which i believe you mean Lord of the rings.
Seeing the clothing and the weapons i'd say this is arround 300 before christ.
that means the Romance of the three kingdoms era.
the japanese clothing means that the japanese did an invasion on china already or that its just merchandise ingame.
i have to go into that there are i believe no (japanese)invasions during the Romance of the three kingdom eras.