Today, lightly roasted bonito was on sale.
In Japanese it's called かつおのたたき (Katsuo no Tataki) and as I said it's lightly roasted on the outside and raw on the inside. Usually you add a dab of pureed ginger on top when you eat it. It's got a bit of a stronger (fishy) taste compared to maguro (tuna) so fair warning before you try it.
For lunch the tataki was accompanied by miso soup with tofu, broccoli, and rice.