Shoyoen was officially opened on November 23, 2002, on the 153rd anniversary of the founding of Dubbo and 13 years after Minokamo and Dubbo became sister cities.

Translated as 'strolling and refreshing garden', Shoyoen contains traditional Japanese elements such as flowing water from a waterfall that symbolises birth, growth and death.

Dubbo City Council manager horticultural services Ian McAlister said about 1800 people attended the event.

"It's really important just to mark these events. The gift of Shoyoen was an incredible gift from our sister city and it's a living gift so over the years it's going to continue to grow and expand," he said.

"It's important for people to appreciate the garden and appreciate our sister city."

Mr McAlister said the night also included a traditional tea service in the Jurian Tea House, which in Japanese culture aims to purify the soul by becoming one with nature.

"It was an opportunity for the people of Dubbo to have a nice family night out," Mr McAlister said.

He said he was thankful to all of the residents of Dubbo who showed their support for the gardens by attending the event.