The paper presents an overview of the historical evolution of BOP supp
ort aid in Japan, including changes in its policies and modalities. Or
ganizational set-up and evaluation methodologies of official donor age
ncies such as the Ministry of Foreign Affairs, OECF and EXIM are expla
ined. The methodologies are analyzed in the following two ways: items
covered in the evaluations and analytical methods. Lessons and suggest
ions from their evaluations are as follows: objectives of structural a
djustment programmes should be clearly defined; direct indicators for
impact should be selected in correspondence with policy measures categ
orized; and the impact of other factors than structural adjustment, es
pecially project aid, should be separated.