When studying topics related to non-English-speaking regions or distant time periods, it is important to recognize that original primary sources texts will most likely be in languages other than English. When researching such topics, it is important to consider whether or not the sources you need actually exist (e.g. a 1500s Japanese newspaper written in English). Fortunately, there are various repositories which contain translated primary source material. On this page is a sampling of online repositories of translated materials.
Remember, just as you would any other source, it is important to evaluate the credibility of the translation. Look for information regarding the translator, publisher, and the hosting site to ensure you are engaging with accurate materials.