- KangXi: not present, would follow page 243, character 4
- Dai Kanwa Jiten: character 5647
- Dae Jaweon: page 483, character 8
- Hanyu Da Zidian: not present, would follow volume 1, page 428, character 2
- Unihan data for U+58F1
|For pronunciation and definitions of 壱 – see 壹 (“faithful; committed; one, variant of”).
(This character, 壱, is a variant form of 壹.)