Thee firm added that it did not foresee egg supply in Japan to"normalise" in the near future given the mass culling of hens.
Food security experts also say price pressures will likely continue for the near future.
Production isn't expected to fully recover as the bird flu outbreak shows no signs of abating, said Katsuhiko Kitahara, an executive research fellow at Norinchukin Research Institute.
"Some farms are expected to go out of business due to high feed prices," he told the BBC.
So that's led to a surge in restauranteurs and home cooks seeking alternatives. For example, seafood giant Nissui Corporation makes a tamagoyaki - a