Some of rare examples are warabi-teto (which is called Kurozukuritachi in Shosoin) and kurotsukuri-no-tachi which have been housed in Shosoin since the Nara period, and kurourushi-no-tachi from the Heian period housed in Kurama-dera Temple in Kyoto, which is said to have been carried by SAKANOUE no Tamuramaro.
希少な例として、正倉院に奈良時代から伝わる蕨手刀（わらびてとう正倉院では黒作横刀と呼称）や黒作大刀（くろつくりのたち）などがあり、京都の鞍馬寺には坂上田村麻呂の佩用と伝えられる平安時代の黒漆大刀（くろうるしのたち）がある。