KOTORI LETTER was created after the sudden outbreak of COVID-19 in 2020, which forced people to live in self-restraint and not see their loved ones for days on end. During the period of self-restraint, many people's primary concern was whether their loved ones (parents, grandparents, etc.), who were far away and could not see them immediately, were safe.  We thought that in a world where people are strongly called upon to connect with each other, if we could properly convey the words we want to say to our loved ones and if those words could function as a charm, even if they are far away, we could give them peace of mind through the power of words. KOTORI LETTER aims to protect our connections with people through such "words," We designed a letter set in which the words you write become a charm. We have produced a total of eight designs. When making a promise, visiting an important person, expressing gratitude, making a wish, conveying honest words, expressing love, celebrating, making a decision. Depending on the occasion, various types of KOTORI will accompany you.