- Abandoned Children (568)
- Ability Steal (324)
- Absent Parents (642)
- Abusive Characters (681)
- Academy (1727)
- Accelerated Growth (420)
- Acting (864)
- Acupuncture (21)
- Adapted from Manga (58)
- Adapted from Manhua (15)
- Adapted to Anime (361)
- Adapted to Drama (392)
- Adapted to Drama CD (236)
- Adapted to Game (46)
- Adapted to Manga (1314)
- Adapted to Manhua (494)
- Adapted to Manhwa (536)
- Adapted to Movie (66)
- Adapted to Visual Novel (17)
- Adopted Children (298)
- Adopted Protagonist (340)
- Adultery (329)
- Adventurers (1155)
- Affair (248)
- Age Progression (540)
- Age Regression (377)
- Aggressive Characters (335)
- Alchemy (765)
- Aliens (356)
- All-Girls School (51)
- Alternate World (1201)
- Amnesia (678)
- Amusement Park (12)
- Anal (69)
- Ancient China (1786)
- Ancient Times (1205)
- Androgynous Characters (174)
- Androids (99)
- Angels (209)
- Animal Characteristics (374)
- Animal Rearing (85)
- Anti-Magic (42)
- Anti-social Protagonist (196)
- Antihero Protagonist (643)
- Antique Shop (24)
- Apartment Life (77)
- Apathetic Protagonist (270)
- Apocalypse (1126)
- Appearance Changes (352)
- Appearance Different from Actual Age (376)