The present invention relates to a use of an acid in a manufacture of an organopolysiloxane through a condensation reaction of a silicon-containing compound containing a silicon-bonded hydroxyl group and a silicon-containing compound containing a silicon-bonded aminoxy group. Particularly, the present invention relates to a low-odor composition including such an organopolysiloxane. The composition according to the present invention can have little odor caused by a by-product produced via the condensation reaction described above.
