8-12, also colloquially known as Eights, is a convenience store chain mentioned in AI: THE SOMNIUM FILES.
Eights are convenience stores that are popular across Japan.
- 8-12 is a reference to the Japanese-American convenience store chain 7-Eleven, sometimes written as 7-11. Adding +1 to each number gives you the name 8-12.
- In the real world, 7-Eleven was named after their original hours of operation, opened from 7 AM to 11 PM. It's possible that 8-12 was for similar reasons, originally open from 8 AM to Midnight.