daisho

The daishō (大小, daishō)—"large and small"—is a Japanese term for a matched pair of traditionally made Japanese swords (nihonto) worn by the samurai class in feudal Japan.
The etymology of the word daishō becomes apparent when the terms daitō, meaning long sword, and shōtō, meaning short sword, are used; daitō + shōtō = daishō. A daishō is typically depicted as a katana and wakizashi (or a tantō) mounted in matching koshirae, but originally the daishō was the wearing of any long and short katana together. The katana/wakizashi pairing is not the only daishō combination as generally any longer sword paired with a tantō is considered to be a daishō. Daishō eventually came to mean two swords having a matched set of fittings. A daishō could also have matching blades made by the same swordsmith, but this was in fact uncommon and not necessary for two swords to be considered to be a daishō, as it would have been more expensive for a samurai.

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