Photos of boiled eggs with white yolks have gone viral on Japanese social media, sparking curiosity about their authentic-ity. The trend began with a post by Tsuda Junko, editor-in-chief of the online magazine Design no Hikidashi, showcasing a boiled egg cut in half, revealing a yolk almost as white as the egg white.

This variety of Okinawa eggs, known as `Shirotama,` sourced from the Nakamura Horticultural Farm in Itoman City, the southernmost chicken farm in Japan. The unusual yolk colour is believed to result from supplementing the chickens` feed with rice, which turns the yolk white when cooked. These eggs are commonly used to prepare white rice omelette and white tamagoyaki.