noun
Imperial regalia; sacred jewel
Specifically refers to the Yasakani no Magatama, one of the three Imperial Regalia of Japan. Used in historical, ceremonial, or mythological contexts.
See also: 八尺瓊勾玉
神璽は三種の神器の一つである。
The sacred jewel is one of the three Imperial Regalia.
noun
emperor's seal
Refers to the imperial seal used by the emperor. A formal, historical term; not used for ordinary seals.
詔書には神璽が押された。
The imperial edict was stamped with the emperor's seal.