I have been to Fukuoka three times and go to the Botanical Garden every time. The reason is that there is a car at the bus stop at the entrance of JR Hakata Station. When I arrived at the Botanical Garden, I went around. It was a quiet residential area. It looked quite advanced. There was a South Park with a watchtower and overlooking most of Fukuoka. The botanical garden is actually good, and it doesn't feel bad to buy a ticket to see it.