This cookbook primarily focuses on providing the reader with authentic, mostly Japanese recipes for lunchboxes that can be easily recreated at home. It includes introductions to Japanese foods and essential gadgets needed in the bentō world. Additionally, there are tips on whether a dish can be prepared the night before or reheated in the microwave. The design of a bentō is also covered. The themed bentōs showcase lunchboxes for various occasions like Christmas or Valentine's Day, where appearance is particularly important. This book features traditional and modern Japanese recipes, the author's own creations, and the development of unique style elements for the first lunchboxes. It is further enriched by the wit and charm of the two manga artists.