Envelopes are big business in Japan, so it's no wonder there is a day for them

Sometimes, some of Japan's daily anniversaries or commemorations or observances really do take me by surprise, but "Envelope Day" (封筒の日) is not one of them. Because envelopes are a very big business in Japan. Probably more so than any other country, as there are many different types. Varieties I never saw in my home country. Some of which have important cultural meaning behind them. Not all of them are for the post either, some are particularly designed for hand giving occasions too. 

Envelope Day (封筒の日) is on today and February 10th annually. The reason for the date is because 2/10 can be read “fū (2) tō (10),” the Japanese word for envelope. The anniversary was created by Mutoh Unipack, a Tokyo‑based company that has been making envelopes, paper goods, and packaging for decades. Their goal is to help people rediscover the charm of sending something by hand, especially in an age where most messages arrive as notifications.

What’s lovely is that the company doesn’t just celebrate the day in name. Their in‑house “Envelope Girls Club” produces special items to mark the occasion, including a handmade greeting‑envelope series called kotonoha＋bloom. Each one pairs their highest‑quality envelope with a delicate paper‑craft flower, all made by hand, so no two are exactly alike. They’re designed for moments when you want to send something a little more heartfelt—something that feels like a keepsake in itself.

(The photo in this post is just a generic envelope image).