Details
| Name / Japanese | Calstone Light O / カルストンライトオ |
| Birth Year | 1998 |
| Sex | male |
| Earnings | 422,044,000 yen |
| Races-Win / G1-Win | 36-9 / 6-1 |
| Sire | Warning |
| Dam (Sire) | Oshima Lucia (Crystal Glitters) |
| Other site link | JBIS / Umanity / netkeiba |
All G1 races + grade-races he won
| Y D/M |
Track | Race | No. | Pl. |  |
| 2000 10/12 |
Nakayama T1600 |
Asahi Hai Sansai Stakes (G1) | 15 | 10 | ◆ |
| 2002 18/08 |
Niigata T1000 |
Ibis Summer Dash (G3) | 12 | 1 | G |
| 2003 05/10 |
Nakayama T1200 |
Sprinters Stakes (G1) | 9 | 13 | ◆ |
| 2004 22/08 |
Niigata T1000 |
Ibis Summer Dash (G3) | 5 | 1 | G |
| 2004 03/10 |
Nakayama T1200 |
Sprinters Stakes (G1) | 5 | 1 | ◆ |
| 2004 12/12 |
Sha Tin T1200 |
Hong Kong Sprint (G1) | 3 | 14 | G |
| 2005 27/03 |
Chukyo T1200 |
Takamatsunomiya Kinen (G1) | 13 | 4 | ◆ |
| 2005 02/10 |
Nakayama T1200 |
Sprinters Stakes (G1) | 9 | 10 | ◆ |
- In the Ibis Summer Dash (2002), he was 2nd favorite.
He ran the outer-rail and finished 1st.
It was his first grade-race win.
His record of 53.7 seconds is still the Japanese record for the 1000m as of January 2021.
The first 3 furlongs (600m) of the race was an amazing 29.6 seconds, which is also probably a Japanese record. - In the Ibis Summer Dash (2004), he was 1st favorite.
His jockey, Naohiro Ohnishi, ran him towards the outside just after the start of the race.
(The outside has the advantage in the 1000m straight at Niigata Racecourse.)
He won by 3 lengths. - In the Sprinters Stakes (2004), he was 5th favorite.
Sunningdale was 1st favorite and Durandal was 2nd favorite.
He sped up on the final corner.
He won by 4 lengths.
It was his first G1 win.
Evaluation of him
- He was said even a 1200m race would be too long for him.
(Ibis Summer Dash (G3) is the only grade-race of 1000m in Japan.
The 1000-meter course at Niigata Racecourse is the only straight track in Japan.)
People say he would have been better off in Europe, where there are more 1000m races and straight tracks. - The record he set in the Ibis Summer Dash (2002) is tremendous.
Because of this, many people refer to him as simply the fastest horse in Japanese history.