JMA initially estimated tsunami waves to be as tall as 2 metres when it hit the Japanese northern and eastern coasts, but it turned out to be merely 40 centimetres when it reached Hanasaki Ko, Nemuro, Nemuro, Hokkaidō at 9:29 pm local time. The tsunami also hit the rest of Hokkaidō and Tōhoku Region.
JMA initially estimated that tsunami waves would be approximately 2 meters high along Japan's northern and eastern coasts, but they were actually just 40 centimeters tall at Hanasaki Ko, Nemuro, Nemuro, Hokkaidō. The tsunami also affected the rest of Hokkaidō and Tōhoku Region.