Mudra's history runs in two directions from a shared root. The iconographic tradition develops earliest and most visibly, in the figural Buddhist art that emerges in the early centuries CE, where a limited, standardized set of hand gestures let sculptors and painters encode a specific moment or quality of a Buddha or deity for viewers across a wide geographic and linguistic range, a visual language that spread essentially intact as Buddhist art moved into Central Asia, China, Korea and Japan. The practitioner tradition, hasta mudras performed by a living body rather than depicted in stone, is elaborated later, chiefly in medieval hatha yoga texts and in Hindu and Buddhist tantric ritual manuals, which describe specific hand positions as tools for directing attention or, within their own subtle-body cosmology, for sealing or channeling prana. These two streams reinforced one another without ever fully merging: a meditating practitioner's hand position and a sculpted Buddha's hand position can share both form and name without every practitioner mudra corresponding to an iconographic one or vice versa.
Esoteric Buddhism carried mudra practice furthest into ritual elaboration, particularly in the Shingon tradition Kukai founded in Japan in the ninth century, where precise hand seals form one part of a tightly coordinated ritual system alongside mantra and visualization, traditionally transmitted through formal initiation rather than open teaching, a restriction that scholarship on Japanese esoteric Buddhism describes as structural to the tradition rather than incidental to it.