Damage from last year 's earthquake and tsunami estimated to cost $ 300 billion . CNN 's Claudia Maiko Brunner contributed to this report . Comment: Daily workforce of 1,000 still needed to deal with mountains of debris . Huge rise in volunteer workers since last March 's tragedy .
Damage from last year 's earthquake and tsunami estimated to cost $ 300 billion . Comment: Daily workforce of 1,000 still needed to deal with mountains of debris . Huge rise in volunteer workers since last March 's tragedy .