Hokuetsu Paper Mills is a Japanese paper milling company. It was established in 1907.

A paper mill is a factory devoted to making paper from vegetable fibres such as wood pulp, old rags and other ingredients using a Fourdrinier machine or other type of paper machine.

Historical investigations into the origin of the paper mill are complicated by differing definitions and loose terminology from modern authors: Many modern scholars use the term to refer indiscriminately to all kinds of mills, whether powered by humans, by animals or by water. Their propensity to refer to any ancient paper manufacturing centre as a "mill", without further specifying its exact power drive, has increased the difficulty of identifying the particularly efficient and historically important water-powered type.

While the use of human and animal powered mills were known to Chinese and Muslim papermakers, evidence for water-powered paper mills is elusive in both of them. The general absence of the use of water-power in Muslim papermaking is suggested by the habit of Muslim authors to call a production center not a "mill", but a "paper manufactory".