"H" debuted at number one on the Weekly Singles Chart and peaked at number one for three non-consecutive weeks, including its debut week, its second week and its fourth week on the chart, with the third week being occupied by Misia's single "Nemurenu Yoru wa Kimi no Sei". The song stayed in the top ten for seven weeks, slipping to number thirteen in its eighth week. The song lasted thirteen weeks inside the top forty and ultimately finished its charting run at number sixty-three in its nineteenth week. With a total of nineteen weeks in the singles chart, it has become Hamasaki's second-longest charting single since "Seasons", which charted for over twenty weeks.