Natural High

Natural High was a Japanese female duo consisting of vocalist Shiraki Hiroko and pianist/composer Ootake Kaoruko, active primarily between 2003 and 2008. Their sound identity is defined by a sophisticated fusion of vocal jazz, soul, and contemporary J-pop, characterized by Ootake's classically-influenced yet groove-oriented piano arrangements.

Unlike many of their contemporaries who leaned into electronic production, Natural High maintained a core acoustic warmth, often utilizing upright bass and live percussion to ground their sound in a 'live room' aesthetic. Their career arc saw them move from indie beginnings to a major label deal with Sony Music Japan, where they refined their 'urban jazz' sound. Critically, they are respected for their harmonic complexity, often employing jazz-standard chord progressions within a pop structure. They occupy a similar cultural space to artists like Suemitsu & The Suemith, bridging the gap between the conservatory and the charts. Their influence persists among fans of 'sophisti-pop' and sophisticated Japanese female vocalists, prized for their high production values and emotional restraint.