<prompt> Translate the following text to SwahiliIndeed, the famous port city of Nagasaki served as Japans sole point of contact with the outside world during 260 years of self-imposed isolation.  <response>: Kwa kweli, mji maarufu wa bandari wa Nagasaki ulikuwa kituo pekee cha mawasiliano cha Japani na ulimwengu wa nje wakati wa miaka 260 ya kujitenga. 