“…This issue of the International Journal of Stem Cells includes special reports based on the OSI guidelines. It features the latest information on standard organ-specific production and explores the future development directions: Ahn et al ( 6 ), introduces cell type-specific culture strategies for organoids and presents quantitative and qualitative testing methods at endpoints; Lee et al ( 7 ), discusses factors critical to organoid viability, including cell and organoid packing and transportation methods; Moon et al ( 8 ), provides up-to-date information on culturing conditions and procedures for hepatotoxicity evaluation organoids, liver-specific functionalities, essential cell compositions, and test methods for quality evaluation criteria; Lee et al ( 9 ), for heart; Kang et al ( 10 ), for kidney; Lim et al ( 11 ), for lung; Kwak et al ( 12 ), for brain; and Lee et al ( 13 ), for skin. In addition to the above guidelines, Son et al ( 14 ) established the standardized manufacturing, maturation, and quality assessment protocols for human intestinal organoids through OSI activites.…”