Something I noticed when I last visited Japan was how pristine the parks were. Even in small, local parks, local councils build public bathrooms that look so much nicer than those I've seen in Australia. That isn't to say that the hygiene inside is perfect. I recommend you bring your own flushable wipes and some fragrant oil, which I sprinkled whenever I had to use a public bathroom.
I had a chance to visit one such park close to YAMAMOTO Roketsu dyeing studio. It was called Umazukajido Park (午塚児童公園).
(Pictures from a park and public restroom in Japan. I was there 2019.) But I was still struck but how beautiful the architecture itself was. I also felt it might be interesting for people to know what parks in Japan look like. I found it was pleasant to simply sit in one eating some bread and listening to music.
(An old friend of mine entertains children in a park in 2019.)
Something I've learned is that Japanese parks are distinct in that they tend to preserve equipment from earlier periods, so that they evoke a sense of nostalgia in the visitors. It's considered important that you use the bins in Japanese park and do not litter.
Fun fact; Japan opened its first national parks in 1873.