otama-jakushi is the Japanese word for tadpole. We’ve been watching these grow in the Tokyo War Memorial Park near Korakuen station. Their heads are bulging out now and if you look carefully, you can see the budding legs (not in this photo, though, sorry!).
The park was also the site of my first dragonfly (tanbo)sighting of the season, across the tiled plaza hovering near another manmade pond.