noun
opening sealed correspondence (crime)
Legal term for the crime of opening another person's sealed letter or document without permission.
信書開封罪は刑法第百三十三条に規定されている。
The crime of opening sealed correspondence is stipulated in Article 133 of the Penal Code.
Compound of 信書 (しんしょ, 'letter, correspondence'), 開封 (かいふう, 'opening a seal'), and 罪 (ざい, 'crime').