On May 11, 2020, Empress Masako attended a sericulture ritual at the Imperial Palace. During the ritual, Empress Masako fed mulberry leaves to silkworms at Momijiyama Imperial cocoonery.
Adjustments were made for the imperial sericulture ritual due to the coronavirus. Only 1 staff member worked with Empress Masako instead of 5, and only 1 variety (Koishimaru silkworms) was bred this year instead of the usual 4 (Koishimaru, Hakken, Ouken, Tensan).
