is a Japanese comedy manga series by Mari Yamazaki. It was serialized in Shueisha's seinen manga magazine Grand Jump from March 2018 to July 2022, with its chapters collected in seven tankà Âbon volumes. An anime television series adaptation titled Bessatsu Olympia Kyklos aired from April to November 2020.
Demetrios, a timid and kindhearted pottery painter, lives in ancient Greece and dislikes sports and competition. One day his village is challenged by the mayor of a neighboring town to save his village, Demetrios panics and hides inside a large clay pot, only to be struck by lightning. He is transported to Tokyo in 1964, which is hosting the 1964 Summer Olympics. There, he is taken in by a modern Japanese family who assume he is a harmless foreigner, allowing him to observe contemporary society and athletic events firsthand.
Each time Demetrios is struck by lightning, he travels back and forth between ancient Greece and modern Japan, bringing with him ideas inspired by modern sports. Applying this knowledge to his own era, he gradually gains confidence, earns the respect of his fellow villagers, and helps introduce new forms of competition.
Written and illustrated by Mari Yamazaki, Olympia Kyklos was serialized in Shueisha's seinen manga magazine Grand Jump from March 20, 2018, to July 6, 2022. Its chapters were collected in seven tankà Âbon published from July 19, 2018, to September 16, 2022.
An anime television series adaptation was announced in the 11th issue of Weekly Shà Ânen Jump magazine on February 10, 2020. The clay-animated short series, titled , is directed by Ryà  Fujii, with Fujii, Atsushi Tsuboi and Takeshi Takemura handling series composition. It aired from April 20 to November 2, 2020, on Tokyo MX. Crunchyroll has licensed the anime for streaming. On May 4, 2020, it was announced that episode 5 and later episodes would be delayed due to the ongoing COVID-19 pandemic. It returned on June 22, 2020.