U+319D "㆝" Ideographic Annotation Heaven Mark Unicode Character

U+319D "㆝" Ideographic Annotation Heaven Mark is a small, square shaped CJK (Chinese, Japanese, and Korean) symbol used primarily as a textual annotation or notation mark, typically placed beside or above characters in classical East Asian texts to indicate the word or concept of "heaven," derived from the standard Chinese character for heaven (天). This character belongs to the Kanbun block of Unicode, which contains marks historically employed in Japanese annotation of classical Chinese texts to aid in reading order, grammatical parsing, or semantic clarification, particularly within scholarly religious or philosophical writings.