Whiteouts can occur very suddenly
If you encounter a whiteout, turn on your car’s lights
If you get stuck, call 📞＃9910
'Whiteout' and emergency contact information
A whiteout happens when your visibility suddenly becomes obscured by snow, turning your view completely white. In case you encounter one, NHK World has compiled a list of actions to take, as well as terrain prone to whiteouts.