Loom, method for producing textile, and ultrahigh-density textile

A loom comprising:

• a plurality of heddles that separate a part of a plurality of warps from the other part of the plurality of warps to form a shed between the part of the warps and the other part of the warps, each of the warps being a polyester yarn;
• a weft inserting unit that makes a weft pass through the shed, the weft being a polyester yarn;
• a reed that presses the weft, having been passed through the shed, against a fell to make a textile;
• a feeding roller that feeds the warps to the heddles from a position displaced from an imaginary plane passing through a center of a moving range of the heddles and the fell;
• a let-off beam that feeds the warps to the feeding roller;
• and
• a textile winding beam that winds the textile, wherein
• a tension of the warps when the heddles are located at the center is set to 0.32 cN/dtex or more and 0.38 cN/dtex or less.