Haku (ハク。) is a four-member band based in Osaka, Japan. The band was formed in 2019 and is signed under the label SPACE SHOWER MUSIC. The members include Ai (あい, vocals, guitar), Nazuna (なずな, guitar), Kano (カノ, bass, chorus), and Mayu (まゆ, drums). The name "Haku" (白) means "white" in Japanese, symbolizing their desire to remain free and adaptable in their music without being confined to one particular genre. The "。" at the end of their name was added to represent their origins in a music circle during high school.