Many arts give the famous black-belt at shodan (1st dan) level. However, in iaido & jodo, there are no coloured belts to designate grade.
From beginner to shodan in iaido or jodo takes approximately 18-24 months of weekly practice. Please note, however, that this is considered a beginner grade, and development should continue past this first milestone to deeper understanding of the art.
Posted in: Practicing