In April 1992, the National Association of Takimono Senko Unions designated the 18th of April as 'Incense Day' because April was the time when, as identified by the above-mentioned descriptions in the Nihonshoki, Jinsui Koboku had arrived Japan for the first time, and the word '香' ('incense' in English) can be associated with the 18th, as the word can be divided into '十' (ten) and '八' (eight), thus equaling 18.
現在では、1992年（平成4年）4月に、全国薫物線香組合協議会が、上記の日本書紀の記述に基づいて沈水香木が伝来した4月と、「香」の字を分解した「一十八日」をあわせて4月18日を、「お香の日」として制定している。