<prompt> Translate the following text to SwahiliMerchants thronged to the large cities that were growing up around the castles at Edo population already 1 million in the 18th century, Osaka 400,000, and Nagoya and Kanazawa each 100,000 all huge in comparison with European cities of the time.  <response>: Wafanyabiashara walihamia miji mikubwa iliyokuwa ikikua karibu na majumba ya Edo iliyokuwa na idadi ya watu milioni moja katika karne ya 18, Osaka iliyokuwa na watu 400,000, na Nagoya na Kanazawa kila moja ikiwa na watu 100,000, miji mikubwa sana ikilinganishwa na miji ya Ulaya ya wakati huo. 