Yokoso! Kira Kira, Doki Doki, Mochi Mochi, Puyo Puyo, Waku Waku, Wasshoi!refers to one of Emu Otori's infamous greetings in the Hatsune Miku: Colorful Stagegame, after Wonderhoyand Hello! I'm Emu Otori! Emu Is Meaning Smile!. Like other catchphrases of the character, the phrase grew popular as an inspiration for a series of edits on You Tube.
