One of the most popular ways to get around Nagasaki with public transport is the tram. There are many Japanese cities that have a intra-urban network of trams, but I quite liked Nagasaki because the trams themselves are tiny, narrower and more colourful than I've seen in other cities, they kind of look like toy trams. They give a greater sense of placement and proximity. If you come to Nagasaki, even though they are a bit slower, I would still recommend the trams over the trains because you get a better sense of the city. Plus they're cheaper than the bus or the train.