It’s not raining so I’m in the middle of my sunny-day-plan: visiting Koishikawa Korakuen Gardens.
According to the leaflet (one on the photo above) I got at the entrance, Korakuen is derived from a Chinese text Gakuyo-ki by Fan-Zhongyan, and means Worry before all worries in the world, and enjoy after all enjoyments in the world.
The place is very peaceful and yet, full of life: you can hear and see lots of different birds, there are also many various insects. The garden must look stunning in the fall (maples, maples everywhere!).
Admission fee is 300 yen, so quite cheap for a Special Place of Scenic Beauty and Special Historic Site (titles given under the Cultural Assets Preservation Act).