Shodo, literally the way of writing, names Japanese brush calligraphy as a disciplined practice rather than merely a craft skill, following the same do suffix, way or path, that marks other Japanese arts cultivated as vehicles of personal and spiritual discipline, judo, kado (flower arranging) and sado (tea ceremony) among them, a naming convention that signals shodo is approached traditionally as much for what practising it does to the practitioner's attention and character as for the finished written object.
The art descends directly from Chinese calligraphy, shufa, brought to Japan along with Chinese writing itself and Buddhist scripture from the sixth century onward, and Japanese calligraphic style developed its own distinct sensibility over the following centuries, particularly through the cursive kana scripts developed specifically for the Japanese language alongside the inherited Chinese characters, kanji, producing a written art capable of moving between angular Chinese derived formality and the softer, more flowing native Japanese hand within a single composition.
Zen Buddhism gave shodo its strongest and most explicitly religious register, since Zen monastic training treats the disciplined, fully present brushstroke, executed without hesitation or correction once begun, as itself a form of meditative practice, the physical act of writing understood as revealing the calligrapher's state of mind directly onto the page in a way conscious effort to disguise cannot fully prevent.