noun
tension and relaxation; alternating strictness and leniency
A yojijukugo describing the principle of balancing tension with relaxation, or strictness with leniency, often in management or life philosophy.
リーダーシップには一張一弛のバランスが大切だ。
In leadership, a balance of tension and relaxation is important.
His educational policy is based on alternating strictness and leniency.