Receipts at the canteen give you detailed information about the nutritional content of your meal. Let’s see if you can find the number of kilocalories I ate.
Additionally, the receipt calculates how well your meal matches some benchmark. Essentially, they want you to choose your food items in such a way that the red (赤), green (緑) and yellow (黄) numbers match the recommended values for your sex (male 男 and female 女). I think, red counts protein, green counts vegetables, and yellow is for carbohydrate sources. So, you can easily see that I am not eating healthy, at least according to Japanese standards. Additionally, I have just discovered that I ate 3.0g of salt (塩) just in this one meal, and I didn’t even have any Ramen. This seems crazy to me.