重要美術品 Juyoubijutsuhin / Important Artwork 

What is Juyoubijutsuhin in Japanese Katana terminology?

This refers to cultural properties designated by the Japanese government in 1933 (Showa 8) under the law 'Law on the Preservation of Important Artworks and the like' to prevent the outflow of cultural properties overseas. Currently, no new designations are being made.