Joden (定田) refers to rice fields which were designated, as a result of a kenchu (land survey) on territories belonging to shoen (manors) and koryo (public lands), as taxable lands in regard to the payment of kanmotsu (tribute goods paid as taxes or tithes), shoto (tax on rice fields), nengu (annual tribute, land tax), and kuji (public duties).
定田（じょうでん）とは、荘園・公領に対する検注によって官物・所当・年貢・公事の賦課対象と認定された田。