That was Sobagaki....it looks like fish ball or meatball..bit. This is made of buckwheat flour. I would say it's buckwheat polenta.
In the soup, sliced carrot, sliced radish ( Japanese daikon radish) and komatsuna ( green veggie similar to spinach ).
Healthy, light lunch. I had to work this weekend and to refresh myself, I walked over to the park and enjoyed the plum blossoms there.