noun
emperor; His Majesty
Honorific term for the reigning emperor, used in formal or respectful contexts. The reading しゅしょう is obsolete.
主上陛下の御臨席を賜り、式典が執り行われた。
The ceremony was held with the gracious attendance of His Majesty the Emperor.
Composed of 主 (lord, master) and 上 (above, superior), literally meaning 'supreme lord'. The reading しゅじょう is standard; しゅしょう is an obsolete variant.