"Ievan Polkka" is a song written in 1928, set to a traditional Finnish melody. After falling from popularity it was revived by Finnish band Loituma in the 1990's, and in 2007 a cover by Otomania was released, voiced by Hatsune Miku and accompanied by a video illustrated by Tamago.

The accompanying video to Miku's cover of "Ievan Polkka" features Hachune Miku (はちゅねミク), a blank-eyed doll-like chibi version of Miku. In the video, she waves a negi (also called a Welsh onion or spring onion) in time to the music, establishing the negi as Miku's signature item. The video is a reference to a then-popular internet meme called "Leekspin", which features an animation of Orihime Inoue from the Japanese manga Bleach twirling a negi (misidentified as a leek) to an infinite loop of the 5th stanza of "Ievan Polkka". Riding on the popularity of the meme, Hatsune Miku's cover of "Ievan Polkka" became her first popular work. Since then the song has been covered countless more times by other Vocaloids; numerous versions exist, including solos, duets and even a quartet mimicking the original.

Many mistake the title for Levan Polkka, thinking the capital "i" is a lowercase "l".

In October 2020, a meme was created, following the usage of this song, covered by a turkish man named Bilal Göregen.

https://www.youtube.com/watch?v=CAyWN9ba9J8

https://www.youtube.com/watch?v=Avj37kydNKQ