Previously, “Frozen Vacuum-packed Seared Katsuo (bonito)” consisted of seared katsuo and sauce / condiment-packet into waterproof corrugated cardboard container. And the appearance was not good because the contents were not held in place, and also the deformation of the container has been found. To address this, we developed styrofoam container for cold-temperature insulation, and provided visually attractive color-printed sleeve, and partition to hold the contents in place. The lid fits without use of tape, is easy to open, and a niche for prying open with a finger is also provided.