pronunciation - When reading an English sentence containing a word with foreign origin, should one try to read it with pronounciation from the original language?

Say I am reading the following sentence:

Tokyo has served as the Japanese capital since 1869.

For the word Tokyo, if I happen to know how to pronounce it in Japanese (the pronunciation is similar to, but different from, the pronunciation in English), should I pronounce it in the Japanese way or the English way?