息を整える。

The expression combines '息' (iki), meaning 'breath', and '整える' (tonoeru), meaning 'to put in order, to get ready, to arrange, to adjust'. The concept of adjusting or ordering one's breath has deep roots in Japanese culture, often associated with martial arts, meditation, and theatrical performances. In ancient Japan, controlling one's breath was seen as essential for both physical and mental discipline. Samurai, for instance, would often practice breathing techniques to calm themselves before battle or to maintain focus during intense training. Similarly, in traditional Japanese performing arts like Noh and Kabuki, actors meticulously control their breathing to achieve specific vocalizations and movements, conveying emotions and maintaining rhythm. The verb '整える' itself has been in use for centuries, appearing in classical literature and historical documents, reflecting its fundamental role in describing the act of bringing something into a proper or desired state. The combination specifically referring to breathing became a common idiom over time, reflecting a societal understanding of breath regulation as a way to regain composure and physical equilibrium. Its usage has persisted into modern Japanese, maintaining its original nuance of restoring internal balance after a disruptive event, whether physical or emotional. The phrase encapsulates a holistic approach to well-being, where physical actions like breathing are intertwined with mental and emotional states.