A controversy has arisen over the country of origin labeling standards for shiitake mushrooms grown in Chinese culture media, as the majority of the process, including spawn inoculation and the provision of nutrients, is done in China. The issue arose with the introduction of new labeling regulations in January 2021, which mark the country of origin based on the longest cultivation period. However, these regulations have led to confusion, with mushrooms labeled as 'made in China' or 'made in Korea' depending on the cultivation period. Stakeholders have called for improvements to the labeling system, citing its ambiguity and the potential for consumer confusion. Discussions are underway to address these concerns.