The DEF Kitchen is a small culinary school near Tōtsuki Culinary Academy.
The DEF Kitchen has classes to teach young children from grades Kindergarten to the 2nd grade how to cook. There is also a class for housewives and middle aged women. The vegetables used in the classroom are supplied by Satoshi Isshiki who sells the vegetables grown in the Polar Star Dormitory plantation. Satoshi helps the school, usually teaching the housewives class due to his popularity with them. Another woman teaches the children's class.
- Surprise-Filled Gyoza - A simple dish taught to the DEF Kitchen children by Sōma and Megumi. After catching their attention with their skills, the duo taught the children to make this simple dish that is filled with various fillings to create a medley of different Gyoza for the children to enjoy.