I don't know what this statue is, but you can get a pretty good look at it from the hill that the 26 Saints were crucified on. I'm guessing it's a temple of some sort, but again I don't know for sure.
Nagasaki is also the place where the famous opera Madam Butterfly takes place. This sad story can be felt at the statue of Madam Butterfly in Glover Garden. Here she stands (while the sad music from the most famous part of the opera surrounds her), holding her little child and points to the see ... 'Papa, will come back ... one day ...'
I strongly recommend Kujuku Shima. Even if the day is misty, as it was for us, you will enjoy sea breeze along with the sights. Here, Ryoko holds her nephew Rikuto beside Lee. Those black floats behind them mark cultured pearl beds.
Below and near Kaminoshima Church stands the statue of Our Lady on the Cape welcoming foreign ships to the Port of Nagasaki. The area and the hues of the waters were beautiful that day.
The 26 Saints of Japan consisted of 6 European missionaries and 20 Japanese missionaries. They were all arrested since Christianity was outlawed in Japan. The Japanese crucified all 26 of them.