The National Institute of Agrobiological Sciences has developed a rice cultivar for the treatment of Japanese cedar pollinosis which contains the Japanese cedar pollen antigen but the Ministry of Health, Labor and Welfare does not recognize this as a food product.
農業生物資源研究所はスギ花粉の抗原を含んだ「スギ花粉症緩和米」の開発を進めているが、厚労省は食品とは認められないなどとしている。