I was volunteering in Tohoku.
I'm living by myself in Tohoku now.
A magnitude 8.9 earthquake slammed into Japan’s northeastern coast.
The East North area of Japan is called Tohoku or the Tohoku region. It was the region hit by the 2011 Tohoku Earthquake. This can also mean northeast region when talking about China or Japan, but for other countries (and for the direction) we'd use 北東.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.