Japan's envoy to Colombo Kunio Takahashi gave a grant of 780,000 US dollars (85 million rupees) for demining in the Sri Lanka's north.
Ambassador Kunio said over the past two years there has been a "tremendous improvement in terms of security and development of Sri Lanka.
"
"However, I believe that the efforts of the Government and the people of Sri Lanka toward reconciliation and reconstruction should be continued," he said in a statement.
"The Government of Japan will maintain a mutual supportive relationship with Sri Lanka.
"
Since 2003, Japan has given21.5 million US dollars (about. 2,300 million rupees) for demining activities in former war zones the North and the East.
A 30-year war ended in 2009.
The latest grant for demining carried out by the Swiss Foundation for Mine Action (FSD) will see lands being made safe for more than 5,000 people in Vavuniya and Mannar districts.
Japan had also helped with improving Jaffna Teaching Hospital, construction of Vavuniya-Killinoc