The drugs have long been used by patients in Japan since their respective launches there decades ago, according to the Eisai. "Divesting rights for these products to Kaken, which has strengths in the products' disease areas, is the most optimal choice to ensure them to continue contributing to a greater number of patients," it added. Eisai will receive JPY 3.8 billion ($25 million) under the deal, and will proceed with the transfer of marketing capabilities by March 2025, followed by the transfer of manufacturing and marketing approval. The company said it doesn't anticipate any changes to its consolidated financial forecast for the period ending March 31, 2024, as a result of the latest deal.