Zinc methyl bacteriopheophorbide-d possessing a 1-hydroxyethyl group at the 3-position self-aggregated in an aqueous Triton X-100 solution to afford a red-shifted Q(y) band, but the substitution of hydroxy and acetoxy groups at its 3(2)-position completely disturbed their self-aggregation. Their neighboring groups intramolecularly interacted with the 3(1)-hydroxy group to prevent them from producing chlorosomal J-aggregates.