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.
