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We observed sub-km MBAs by Subaru telescope + Suprime-Cam with the B-,v-,R-,I-filters for investigating their colors.We surveyed 6 fields of Suprime-Cams FOV (in total 1.5 deg^2) near ecliptic plane and near opposition.We detected 163 MBAs with the 4 bands.We will report their color distribution and also a correlation between color and orbital distributions.