tacit knowledge
Knowledge that is difficult to articulate or transfer, such as skills, intuition, and personal experience. Often contrasted with 形式知 (explicit knowledge).
See also: 形式知
It is difficult to convert tacit knowledge into explicit knowledge.
A craftsman's tacit knowledge often cannot be conveyed in words.
Compound of 暗黙 (あんもく, 'implicit, tacit') and 知 (ち, 'knowledge'). The term is a calque from English 'tacit knowledge', popularized in knowledge management theory.