In recent years, allergy notices on foods have become much more prominent all around the world and Japan is no exception. Probably one of the most visible places I have seen is at Mister Donut, probably due to the highly processed nature of the products it can be hard to know exactly what they contain. The notices in stores are right next to each donut variety, so they are hard to miss. If you go on the website there is even more detailed information which might be of interest. There is a long list of products and I only included the top few as I was more interested in the types of allergy worthy of inclusion.
The first 7 categories are required to be displayed by law (特定原材料):
wheat, soba, egg, milk, peanuts, shrimp, crab (小麦、そば、卵、乳、落花生、えび、かに)
The second set of 18 categories are not required by law (特定原材料に準ざるもの):
beef, pork, chicken, gelatin, soy bean, abalone, squid, salmon roe, salmon, mackerel, orange, kiwi, walnut, matsutake mushroom, peach, Japanese yam, apple, banana （牛肉、豚肉、鶏肉、ゼラチン、大豆、あわび、いか、いくら、さけ、さば、オレンジ、キウイ、くるみ、まつたけ、もも、やまいも、りんご、ばなな）
Photo is a web capture for explanatory purposes, copyright belongs to the company.