PROBLEM TO BE SOLVED: To provide a konjak product in which harshness causing smell or miscellaneous taste is reduced effectively, and dispensing with a pretreatment for removing them and to provide a production method thereof, and an alkali coagulant suitable for production of konjak.SOLUTION: As an alkali coagulant for konjak production, an alkaline solution is used, which contains non-reducing sugar, calcium hydroxide as an alkaline component for coagulation and water, and in which the non-reducing sugar and calcium hydroxide are dissolved in water.SELECTED DRAWING: Figure 5