The image is from a Japanese article predicting kosa (黄砂; yellow sand) being blown in from China today:
https://weathernews.jp/s/topics/201705/060105/
The article warns about sand in this area tomorrow and says that visibility was reduced here this morning.
The yellow sand particles tend to be a problem this time of year but sandy days become very rare after the rains begin to wash the particles from the atmosphere in June:
http://www.data.jma.go.jp/gmd/env/kosahp/kosa_table_1.html
– Kirk
https://mainichi.jp/english/articles/20170507/p2g/00m/0dm/033000c