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Myaku-Myaku (ミャクミャク, Myakumyaku), officially stylized in all caps as MYAKU-MYAKU, is the mascot and yuru-chara representing Expo 2025, the current world's fair held between April 13 and October 13, 2025, in Osaka, Japan. It was designed by picture book illustrator Kouhei Yamashita [ja] and named through a public contest by entrants Miyuu Kawakatsu and Hinata Sakuda in early 2022.

Design
Myaku-Myaku is described as "a mysterious creature", with a body composed of cells (red) and water (blue). Typically appearing in an upright, bipedal position, one imitating that of human beings, its body is amorphous, and it can transform into various shapes and configurations. It has a blue torso with two legs, two arms, and a red globular ring as a "head" with multiple eyeballs and a smiling mouth in the middle.[1] Yamashita's design was chosen from nearly 2,000 public submissions. About his design, he said, "Rather than smart or good-looking, I thought people would like a clumsy character". Yamashita has supervised development of Myaku-Myaku's identity such as how it walks, talks, and reacts.