Kujirajaku (鯨尺) is a larger kanejaku. It is still used today, for example, to measure lengths of yukata and kimono and hakama. It is a measure from the textile industry, which is measured by the length of a whale’s whiskers. Kujira means whale, so the unit of measurement is named after the animal from which the baleen was taken. These were used as ells in the textile industry. The kujirajaku is about 37.9 cm long.

It is part of the traditional Japanese Shakkanhô-system of measurements.