The "double happiness" symbol, written as 囍, is a Chinese character representing "double joy" or "double happiness" and is commonly used in Chinese weddings and other celebratory occasions. It is composed of two instances of the character 喜, meaning "joy" or "happiness."

Masa Sasaki loves what he does and doesn’t feel like it’s work. There can be stress when filling orders and getting ready for a craft fair or exhibition, but he spoke about it feeling like “good stress.” He’s creating while in a personal state of bliss and joy, and bringing goodness into the world through his objects. The character on several of Masa Sasaki's pieces is the Chinese symbol for double happiness, which is common at weddings and means joy and happiness. Sasaki embeds some of his pieces with this Chinese symbol.