Straw mats removed from trees at winter's end
Workers removed straw mats wrapped around Japanese red pine trees at an ancient burial mound in Otawara City, north of Tokyo on Friday.
According to the traditional calendar, insects are believed to emerge from the ground on the day.
Local elementary school children helped workers at the mound in the city, which is in Tochigi Prefecture. The burial mound, which is a national historical site, is home to more than 100 Japanese red pine trees which are over 100 years old.
They removed and carried the straw mats that were used to lure out harmful insects during the winter.
Children were surprised to see insects on the tree trunks and in the mats.
Some children said work was hard but they enjoyed it. Others said they hope the burial mound will remain the same in the future.