It is famous for easy to cause anaphylaxis.
Labeling is required by law as "7 items of specified raw materials" because the symptoms become serious and life becomes dangerous. Products whose labelings are required by law are not only buckwheat noodles but also buckwheat flour and food produced using it. About 2.4% of allergen food is buckwheat noodles.
People with allergy suffer from allergic reaction even with a small amount of ingestion or buckwheat noodle or ramen boiled in the same pot, so it is necessary to be careful.