When I went to Shimoda I saw a lot of cars from other prefectures. Probably they came to Izu to see Kawazu Sakura festival.
My friend said to me " It took about 4 hours more from Kanagawa to Shimoda today, it’s usually only 3 hours. After Atami we had sometimes traffic jam."
Tomorrow a lot of people will come to Izu more than today, because it will be sunny and we will be able to see full bloom of Sakura.