Update (4/22): NHK seems to have removed this report, including the image, from its online archive. The Asahi article is still there.
According to this NHK interview with Donald Keene, in a time when over half of foreign residents have fled the country, he will take Japanese citizenship and will move to Japan to show his solidarity with the country.
That’s exactly why I didn’t want to leave right after the disaster and why I still don’t want to leave until I have finished my degree, to be a member of this society and to lend whatever support I can while it gets back on its feet.
Update (4/19): Here an article about Keene in English on asahi.com.