designer's own words:Cassette tape reminds past-generation of nostalgia. However, recently, it tend to be thrown away due to CD's, MP3 files. Since it's composed of plastic and film, it's difficult to collect separately when it's thrown away, furthermore, it causes severe pollution throughout the world. That's why I strongly suggest "Tape Calendar" that is made of recycled Cassette tape. I'm sure that numerous users can feel fun, nostalgia by spinning "Tape Calendar". I would say, the concept of "Tape Calendar" is thinking about environment.