My wife had found this ... Fascinating and lots of history of Chinese Buddhism in Nagasaki.
Entrance fee included museum (good exhibits. No photos allowed, signage in Japanese / Chinese).
You can buy koi food to feed the fish in a small pond.
One of the few temples that charge a small entry fee but it’s well worth it and under £4. Plenty of photo opportunities, a museum to visit behind the temple, access to the temple and you can even feed the fish for a small charge.
The entrance fee is quite high (¥660), but decided to go because I was curious to learn more about the history of Confucianism and Chinese influence in Nagasaki. But, the museum is only in Japanese. The temple itself is beautiful, but if you've seen many Confucius temples before and cannot speak or read Japanese, I doubt you will get much out of this visit. I wouldn't recommend going.
It is a beautifully restored Chinese Shrine. There is a small museum at the back. All signage is in Chinese and Japanese, but there is a leaflet in English that is given to foreign visitors upon entry. It is pretty informative. The visit costs 660¥.