A cellulose acylate film that has a crystallization index expressed by expression (A) as defined in the specification of from 0.70 to 1.02 and a modulus of elasticity in every arbitrary direction of an in-plane of the cellulose acylate film of from 3,800 MPa to 6,000 MPa; a manufacturing method of a cellulose acylate film comprising: casting a dope on a support; drying the dope on the support, so as to form a film; peeling the film from the support; and subjecting the film to a stretching treatment, wherein a crystallization index expressed by expression (A) of the film after peeling and before stretching is from 0.70 to 1.00; an optically compensatory sheet comprising the cellulose acylate film; and a polarizing plate and a liquid crystal display device using the optically compensatory sheet.

 
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