This paper aims to investigate the essential meaning of Korean particle ``man`` that has been known to have usages UNIQUE, LIMITATION and EXTENT through comparing with Japanese particle ``dake`` which is similar to ``man``. Although the three are common usages of ``man`` and ``dake``, there are cases that do not parallel to each other. In this paper, these cases are analyzed and I claim that (i) ``man`` has the strong ``exclusiveness`` that is the property of excluding higher members than the quantity indicated by man-attached element, (ii) ``dake`` needs ``certainty of dake-attached element`` which means the speakers hard to use ``dake`` if they could not grasp the details of dake-attached elements. (iii) the three usages have continuity among them, and the central usages of ``man`` and ``dake`` are LIMITATION because of ``exclusiveness`` and EXTENT owing to ``certainty of dake-attached element`` respectively.