PROBLEM TO BE SOLVED: To provide a method for efficiently converting gingerol into a shogaol at a short time for acquiring a shogaol including composition including much shogaol.SOLUTION: The invention is configured to process a mixture of one or two or more kinds of extracts selected from ginger ground product, ginger squeezed juice and ginger pomace, ginger solid matter formed of ginger ground product and/or ginger pomace, and water by subcritical water at pressure of 1-10 MPa and temperature of 120-250°C. In mixing, preparation is performed so as to include 0.1-60 mass% of extracts, and include 1-15 mass% of the ginger solid matter in terms of dry matter, in processing by the subcritical water, preferably, then, after increasing temperature of the mixture to a range of temperature of 120-250°C, then the mixture is held for 10 seconds to 60 minutes in the temperature range, then, an extraction solvent of the extracts is preferably water, organic solvent or a mixed solvent of water and organic solvent.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】ジンゲロールを、短時間で効率的にショウガオールに変換させて、ショウガオールを豊富に含むショウガオール含有組成物が得られる方法を提供する。【解決手段】ショウガ粉砕物、ショウガ搾り汁、及びショウガ搾り粕からなる群から選ばれた１種又は２種以上の抽出エキスと、ショウガ粉砕物、及び／又はショウガ搾り粕からなるショウガ固形物と、水との混合物を、圧力１～１０ＭＰａ、温度１２０～２５０℃の亜臨界水で処理する。混合物中、抽出エキスを０．１～６０質量％、ショウガ固形物を乾物換算で１～１５質量％含有するように調製して、亜臨界水による処理を行うことが好ましく、更に、混合物を１２０～２５０℃の温度範囲まで昇温した後、該温度範囲で１０秒～６０分保持することが好ましく、更に、抽出エキスの抽出溶媒が、水、有機溶媒、又は水と有機溶媒の混合溶媒であることが好ましい。【選択図】図１
