This study considered analysis how the image that I had of the letter representationinfluenced notation of the coffee drink from the standpoint of the sociolinguisticsmark. Specifically, various genus characteristics depended and classified coffee drinkselling in Japan and I analyzed it and considered a letter class and the relationswith various sociolinguistic factors used for notation of the coffee drink how a Japaneseletter class had an outcome, what kind of meaning by an internal external attributeof the coffee drink. The consideration result is settled as follows. ① I have a correlation with a letter class in the notation of the coffee drink andthe kind of the coffee drink. A various letters class tends to be used for a Romaji,“coffee drink with milk” to a Romaji and a kanji, “coffee drink” to “coffee”. ② Ihave a correlation with a letter class in the notation of the coffee drink and thecomponent material included in the coffee drink. Notation varying according tofamiliar condition for having sugar or not, having milk or not and the coffee drinktends to be used. ③ I have a correlation with a letter class in the notation of thecoffee drink and the place of origin of coffee beans. A various letters class tendsto be used for a Romaji, a bean from Southeast Asia in a bean from South America. ④ I have a correlation with a letter class in the notation of the coffee drink andthe roast method of coffee beans. A kanji tends to be used for the product by aspecial roast method. ⑤ I have a correlation with a letter class in the notation ofthe coffee drink and the materials of the container of the coffee drink. Various letterstend to be used for coffee drink made by a Romaji, PET to coffee drink made bya Romaji and a kanji, aluminum to iron coffee drink mainly. ⑥ I have a correlationwith a letter class in the notation of the coffee drink and the release time of thecoffee drink. I tend to change into "Romaji notation and kanji notation → Romajinotation → a variety of notation" by the change of the times. It is used for notation of the coffee drink as a thing reflecting identity of the coffee drink which coffee drink lasts and is going to express in this way, and it may besaid that identity of the coffee drink forms it, and it is strengthened by the imagethat a Japanese letter class kanji and hiragana letter, katakana and Romaji has.