Below is the information I got from Sherwin who posted this comment in the previous post, but in case people don’t click to read the comments, I’ll make a post here.
1) To check the estimated arrival times of tsunami across the world, click here
津波情報、こちらへ
2) To locate persons in Japan, click here
連絡のとれない家族や友人がいる方、こちらへ