In 'History of Korea, New Edition' published by Sanseido, there is an mention that the statement issued by Isshinkai in 1909 was not representing people's voice, and that the number described as 'one million members' was unsubstantial.
三省堂の『朝鮮の歴史　新版』では、一進会が1909年に出した声明について、民衆の声を代表しておらず、かつ「会員100万人」も実体のない数字だったとしている。