rice Gluten free
Nowadays, some people avoid gluten because of allergies or health.
I found an apple sauce package printed " gluten free".
wheat
rice 
wheat Where does wheat come from to Japan?
Some western-style meals need flour, but Japanese wheat production is limited and wheat is imported from the United States, Canada, and Australia. 83.6% of the wheat produced in Japan is wheat for Japanese noodle, Udon. wheat for bread and cakes are not produced much.
wheat Wheat production and consumption
Rice is one of the most important staple food in Japan, but many people tend to eat wheat now.
wheat Flour’s demand increases under Corona outbreak
In Japan, now it is a bit hard to buy flour because people bake cakes and cook dumplings to kill time while staying at home.