Cambodia’s Prime Minister Samdech Akka Moha Sena Padei Techo Hun Sen and Japanese Ambassador to Cambodia H.E. Horinouchi Hidehisa preside over in Battambang city, Battambang province this morning the Groundbreaking Ceremony for the Construction of National Road No. 5 Improvement Project from Battambang to Serey Sophorn with the length of 84.74 kilometres under ODA loan from the Government of Japan.