Bullet trains on the Tohoku Shinkansen Line returned Friday to their normal schedules for the first time since the March 11 earthquake and tsunami.
The line suffered significant damage in the natural disaster.
Operations of the line connecting Aomori Prefecture and Tokyo fully resumed in late April, but trains were forced to slow to a crawl over several sections to ensure safety.
Some 1,200 points on the line were damaged, including power poles and overhead cables.
Under normal schedules, a bullet train can run between Shin-Aomori and Tokyo stations in a little more than three hours.