Spring comes late on Hokkaido, Japan 's northernmost island.

After a long, cold winter, the warmer weather draws people outside.

A highlight of spring in Japan is the Children 's Day Festival, held every year on May the fifth.

Families with children mark the day by flying flags shaped like koi carp.

Each fish represents a different member of the family.

In ancient legends, carp are strong and successful.

These are qualities that parents hope their children will grow up to possess.