I am stuck in my Tokyo office tonight. All the trains have stopped.
I went down to Shinagawa station to see what was happening and take some photos. Glad I have a heated office to sleep in and a blanket at least.
UPDATE: March 12th 10.30am
Finally got home at 5am this morning: car ride from a friend, underground, short walk across Kita-ku, a taxi, bed. The family are all fine. Will add some photos to this post.