For type 2 diabetes (T2D), the recommended meal has shifted from calorie restriction (CR) to a low carbohydrate diet (LCD). LCD gained worldwide prevalence through the efforts of Atkins and Bernstein, and we further developed LCD both medically and socially through the Japan LCD Promotion Association (JLCDPA). The beneficial and convenient methods of LCD include petite, standard, and super LCD, which have carbohydrate ratios of 40%, 26%, and 12%, respectively. For these three types, the approximate permitted carbohydrate amounts in each meal appear to be 20g, 30g, and 40g. Some foods with lower carbohydrate content include eggs (0.1g), a piece of cheese (0.2g), chicken meat (180g) (0.4g), and Japanese tofu (300g) (4g).