Hakai may refer to:

• Hakai (novel), 1906 novel by Tōson Shimazaki
• Hakai (film), 1948 Japanese film, second of three films of the novel
• Hakai (album), by Japanese vocalist Wagdug Futuristic Unity 2008

• Western Pacific Spadenose shark
• Western Pahari language
• Western Palatinate
• Western Palearctic
• Western Paman languages
• Western Panjab
• Western Panjabi dialect
• Western Panjabi language
• Western Panjabi Wikipedia
• Western Papuan languages
• Western Paradise
• Western Parbate Kham language
• Western Park Warragul
• Western Parotia
• Western Pashto language
• Western pasqueflower
• Western pearlshell
• Western pearly everlasting
• Western Pebble-mound Mouse
• Western Penan language
• Western Pennsylvania Collegiate Conference
• Western Pennsylvania League
• Western Pennsylvania Professional Football Circuit
• Western Pennsylvania Pro Football Circuit
• Western Pennsylvania School for Blind Children