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A station attendant (L) uses a loudspeaker to explain train service disruptions for the Tohoku Shinkansen (bullet train) at the Tokyo Station on December 7, 2012 following a 7.3 earthquake and tsunami alert. - 

A 7.3 magnitude earthquake struck this morning off the coast of Japan causing a relatively small tsunami and an evacuation of coastal areas. There have been no reports of significant damage.

Yumiko Ono, managing editor for the Wall Street Journal's Japanese language website, joins us from Tokyo to share Japan's media response and market reaction.

Follow Jeremy Hobson at @jeremyhobson