Tanzaku are small, rectangular pieces of paper traditionally used in Japan for writing wishes, poems, or messages. They are often hung on bamboo branches during the Tanabata festival, which celebrates the meeting of two stars, Orihime and Hikoboshi. People write their hopes and dreams on tanzaku, hoping for them to come true. These colorful strips of paper can be found in various sizes and are typically made from washi, a type of Japanese paper. In addition to the Tanabata festival, tanzaku can also be used in other cultural practices, such as writing haiku or expressing gratitude during special occasions.