Off-center container manufacturing method and temperature adjustment mold

A method of manufacturing an off-center container comprising:

• stretching a heated preform made of resin and having a bottomed shape with a stretching rod;
• and
• blow-molding the off-center container, in which a central axis of a container neck portion is displaced from a central axis of a container body portion, by introducing a pressurized fluid into the preform disposed in a mold, wherein
• the off-center container has a shape in which a dimension in a first direction in a container cross section is longer than a dimension in a second direction of the container cross section that is perpendicular to the first direction, and
• in a circumferential cross section of the preform, a thickness of a first region corresponding to a surface extending in the first direction of the container cross section is set to be thicker than a thickness of a second region corresponding to a surface extending in the second direction of the container cross section.