The Campbelltown-Koshigaya sister city relationship has been going strong for 35 years.
To celebrate the milestone, Campbelltown Council general manager Lindy Dietz and mayor George Brticevic made a quick trip to the Japanese city recently.
"To experience Japanese culture and see the way they do things is just amazing," he said. "There's a lot of love for Campbelltown in Koshigaya."
The Campbelltonians were invited to spend some time with their Koshigayan counterparts and had a ball taking in the annual Awa-Odori Festival.
The event, which is Koshigaya's largest annual festival, celebrates Japanese culture, and is jointly hosted by the local government and community/industry leaders.
Cr Brticevic said there was much to be learned on the whirlwind four-day trip.
"They were long days, we had plans from 8 in the morning to 10 at night," he said. "There was a lot we could learn as far as recycling is concerned, and the running of their festival which celebrates culture and community.
"It's not just the council that runs it, but the local businesses all play their part, which is something different to consider."
Cr Brticevic said the trip further forged the sister city bond and provided a wonderful opportunity to encourage Japanese businesses to invest in the Macarthur region. He said there was even more opportunity for investment with the growing Aerotropolis.