In 1929, the organization (then called the International Hydrographic Bureau) published "IHO Special Publication 23" (IHO SP 23), which established the name of the sea as Sea of Japan; however, at that time, Korea could not participate in the IHO because it was under Japanese rule.
1929年，该组织（当时称为国际水文局）公布的“国际水文局特别出版物23”（IHO SP 23），确立了日本海的名称，但是在那个时候，韩国不能参加该组织，因为当时它在日本统治之下。