With a fierce yell and a resounding thwack, 13-year-old Japanese student Nanami Usui brings her bamboo sword down on her opponent.

By practicing Kendo, or Japanese swordsmanship, Usui is one of several students in the town of Minamisanriku who are rebuilding their confidence after last year's tsunami washed away their homes and shattered their hometown in the country's northeast.

Usui says she dreams of being a police officer, but she doesn't know yet where she wants to live and work.

"Most high school students here have dreams about their future careers," she says, as she prepares to don her helmet and breastplate. "I suppose if you want to become a fisherman you can stay here, but if you want to do anything else, you have to leave this town."

Teacher Dave Rowlands is talking to his students in a kindergarten class at Imagine Japan, an English-language school in the Miyagi Prefecture of Sendai City. The school is just a short walk from pre-fabricated homes built for families who lost more than just property in the earthquake and tsunami last year.

"What came after the earthquake, was what?" Rowlands asks. "A tidal wave. In Japanese, what do we say? Or in English, actually, tsunami is now used around the world in many languages. Tsunami. We kind of leave the 't' off of there."

One year ago this Sunday, a 9.0 magnitude earthquake off Japan triggered a tsunami that killed 20,000 people. It also triggered multiple meltdowns at the Fukushima Dai-ichi nuclear power station, one of the worst nuclear disasters in history.

But health effects from radiation turn out to be minor compared with the other issues the people of Fukushima prefecture now face.

That may come as a surprise. We all watched frightening TV images, and clouds of radioactive steam and gas did erupt from the plant. That material did sometimes move over the countryside and into populated areas, so it looked like a horrible disaster.