<prompt> Translate the following text to EnglishYokohama ilikuwa kijiji kidogo cha uvuvi hadi mwaka wa 1854, wakati karne nyingi za kujitenga kwa Japani zilipokwisha.  <response>: Situated 20 km 12.5 miles southwest of Tokyo, Yokohama was an unimportant little fishing village until 1854, when Japans long centuries of self-imposed isolation came to an end. 