Details
| Name / Japanese | Sleepless Night / スリープレスナイト |
| Birth Year | 2004 |
| Sex | female |
| Earnings | 373,165,000 yen |
| Races-Win / G1-Win | 18-9 / 2-1 |
| Sire | Kurofune |
| Dam (Sire) | What Katy Did (Nureyev) |
| Other site link | JBIS / Umanity / en.netkeiba |
| Awards | JRA Award for Best Sprinter or Miler (2008) |
All grade-races
| Y D/M |
Track | Race | No. | Pl. |  |
| 2008 15/06 |
Chukyo T1200 |
CBC Sho (G3) | 2 | 1 | G |
| 2008 17/08 |
Kokura T1200 |
TV Nishinippon Sho Kitakyusyu Kinen (G3) | 4 | 1 | G |
| 2008 05/10 |
Nakayama T1200 |
Sprinters Stakes (G1) | 14 | 1 | ◆ |
| 2009 29/03 |
Chukyo T1200 |
Takamatsunomiya Kinen (G1) | 4 | 2 | ◆ |
| 2009 13/09 |
Hanshin T1200 |
Centaur Stakes (G2) | 8 | 2 | G |
- She ran two turf races after her debut, but since then she had been running dirt races.
- In the CBC Sho, she was 4th favorite.
It was her first turf race in eleven races.
She won her first grade-race by 1+1/4 lengths. - In the Sprinters Stakes, she was 1ts favorite.
She took the lead before Kinshasa no Kiseki did.
She won by 1+1/4 lengths.
It was her first G1 win.
It was the first victory for her jockey, Hiroyuki Uemura, in his seventeenth year of riding. - She later had plans to race in Hong Kong and Dubai, but due to injury and illness she was unable to do so.
- In the Takamatsunomiya Kinen, she was 1st favorite.
She lost to Laurel Guerreiro by 1/2 lengths. - She was retired just before the 2009 Sprinter’s Stakes due to bowed tendon.
She won a total of nine races, all of which were over 1200 meters, and none over 1400 meters.