This Japanese river turned lime green, and nobody is sure why

Japanese river turns lime green Ikoma city authorities in Western Japan are investigating to determine how the water of the Tatsuta River has turned lime green.

Ikoma city authorities in Western Japan are investigating to determine how the water of a river running through town has turned lime green, causing concerns among citizens.

A video posted on social media by a local resident shows part of the Tatsuta River as it looked on Wednesday.

Nara Prefecture officials ran a test on the water and said it is non-toxic, according to public broadcaster NHK. However, the Ikoma city hall asked farmers not to use it for agricultural purposes until the water safety is confirmed.