By Dr. Toku (DVM)
Hello to horse racing fans around the world. I am Dr. Toku, a Japanese veterinarian and racing analyst.
While most handicappers look at speed figures and pedigrees, I analyze racing from a different perspective: Biomechanics and Veterinary Medicine. I look at the racehorse as an athlete, examining how their anatomy interacts with the specific physical demands of the racetrack.
Today, we are dissecting the Fairy Stakes (G3), a pivotal race for three-year-old fillies held in January. Situated at the start of the year, this race is often the first serious step on the “Road to the Oka Sho” (Japanese 1000 Guineas).
However, the stage—Nakayama Racecourse Turf 1600m—is one of the most physically demanding layouts in Japanese racing. It is a course that breaks weak hearts and fragile legs. To understand who will win, we must understand the physiological torture test that this course imposes on young, developing horses.
Let’s analyze the anatomy of the race.
Introduction: The Crucible for Future Queens
The Fairy Stakes has a unique standing in the Japanese racing calendar. Held in the chill of mid-winter, it gathers young fillies who are often still physically immature. Their skeletal structures are still ossifying, and their muscular coordination is still developing.
Asking these young athletes to tackle the trickiest mile course in Japan is a significant “selection pressure.” Historically, fillies that conquer this race display not just speed, but exceptional constitution and durability.
The gold standard for this race is undoubtedly Mejiro Ramone, the winner of the 1985 edition (then held in December). She went on to become the first filly in JRA history to capture the Triple Tiara. As we will discuss later, her physical traits give us the perfect blueprint for what to look for in a winner.
This isn’t just a race; it is a veterinary exam. Let’s see what questions the course asks.
Veterinary Course Analysis: The Physical Demands of Nakayama 1600m
Many pundits describe Nakayama as “tricky.” As a veterinarian, I describe it as a course that demands high-intensity anaerobic power combined with advanced proprioception (balance).
Here is a breakdown of how the course impacts the horse’s body, section by section.
Phase 1: The Start to Turn 2 (The “Shear Force” Zone)
The race begins in a chute off the first corner. The defining feature here is the incredibly short run-up to the first turn—approximately 240 meters (when the ‘A Course’ rail is used).
- The Anatomical Demand: Because the distance to the corner is so short, jockeys must push horses hard to secure a position. This forces the horse into immediate anaerobic exercise, rapidly depleting glycogen stores in the muscles and producing lactate within seconds of the gates opening.
- The Joint Stress: Entering a sharp corner at high speed while battling for position places immense Shear Force on the distal limbs, particularly the fetlock joints and the collateral ligaments. Furthermore, as the pack condenses entering the turn, horses often have to decelerate rapidly. This “braking” action places a massive spike of tension on the Superficial Digital Flexor Tendon (SDFT) and the Suspensory Ligament. A horse with upright pasterns or fragile tendons is at high risk of injury or performance loss here. If a horse is forced wide here, the centrifugal force requires extra energy from the pectoral muscles to keep the body on track, wasting fuel needed for the finish.
Phase 2: The Backstretch to Turn 3 & 4 (The “Eccentric” Test)
From the second corner through the backstretch and into the final turn, the course features a significant downhill slope.
- The Anatomical Demand: Running downhill forces the horse to use its muscles differently. Instead of propulsion, the muscles must act as shock absorbers. This is called Eccentric Contraction (lengthening under tension). The quadriceps and the muscles of the shoulder girdle must work overtime to absorb the impact of gravity.
- Proprioception: The outer loop of Nakayama has gentle curves but maintains high speed due to the decline. This requires excellent Proprioception—the body’s ability to sense its position in space. Young horses with poor balance (often due to rapid growth spurts) will struggle here. They will feel “unbalanced” to the jockey, leaning out or changing leads awkwardly, which disrupts their rhythm and breathing. Specifically, the Stifle Joint (equivalent to the human knee) and the Hock undergo complex torsional stress here. A horse needs flexible, “loose” joints to navigate this downhill slide smoothly without fighting the track.
Phase 3: The Homestretch (The “Gluteal” Burn)
The final straight is short (310 meters), but it features a notorious steep incline—rising over 2 meters in a short span just before the finish line.
- The Anatomical Demand: This is the “killer” point. The horses have just spent the backstretch using eccentric contraction (braking/stabilizing downhill). Suddenly, hitting the hill requires an immediate switch to Concentric Contraction (shortening/power) to lift the body weight up the slope.
- The Muscle Groups: This switch is neurologically and physiologically exhausting. To conquer the hill after a fast pace, a horse relies heavily on the Gluteal Muscles (the large muscles of the rump) and the Hamstrings (Biceps femoris). Furthermore, the Iliopsoas Muscle (which pulls the hind leg forward) is critical here. When you see a horse “stop” on the Nakayama hill, it is often because the Iliopsoas is fatigued, and the horse can no longer bring its hind legs forward quickly enough to maintain stride frequency.
Key Trends & Data: A Medical Interpretation
Why do certain trends exist in the Fairy Stakes? They are not random; they are rooted in biology.
Trend 1: The Struggle of the “Fresh” Horse
Data shows that horses with little racing experience often struggle here.
- Medical Reason: Motor Learning. The cerebellum (the part of the brain controlling movement) learns through repetition. The Nakayama mile requires complex weight shifting: Sprint -> Brake -> Corner -> Downhill Balance -> Uphill Power. An inexperienced horse’s nervous system cannot anticipate these shifts. They fire muscles inefficiently, wasting energy. A horse that has raced at Nakayama before has “neuromuscular memory” of the track, leading to better Running Economy.
Trend 2: The Mejiro Ramone Blueprint (Case Study)
Looking back at the 1985 winner, Mejiro Ramone, provides a perfect veterinary case study for what is required.
1. The Hocks: As a foal, Ramone had issues with her Hocks (tarsal joints). However, as she matured toward her 3-year-old season, these issues resolved, and her structure balanced out.
- Lesson: In the Fairy Stakes, look for a horse whose hind leg structure has “stabilized.” Avoid horses that still look “butt-high” (croup higher than withers), as this growth imbalance puts excessive weight on the forelimbs during the downhill section.
2. The “Big Belly”: Ramone’s groom specifically noted her “large belly.” In a racing fit horse, a deep girth and full flank are not fat; they indicate massive Cardiopulmonary Capacity.
- Lesson: The Nakayama hill demands oxygen. A deep chest and ample space for the lungs suggest a high VO2 Max. Ramone won even when not at 100% fitness because her “engine” (Heart/Lungs) was simply bigger than her rivals.
3. Constitution over Speed: Ramone suffered from “summer heat fatigue” and hoof issues (stone bruises) prior to her major wins, yet she recovered to win.
- Lesson: The Fairy Stakes winner is often not the fastest horse in a vacuum, but the one with the highest pain threshold and fastest recovery rate. Look for fillies that maintain condition even after hard training.
Dr. Toku’s Veterinary Analysis of Top Contenders (Final Update)
With the barrier draw and morning odds finalized, we can now apply our anatomical analysis to the specific “Trip” each horse will face. The draw at Nakayama 1600m is critical due to the short 240m run to the first turn.
1. Gillie’s Ball (Gate 12 / Odds: 3.6x)
- The Diagnosis: “The Flexible Athlete”
- Biomechanical Outlook: Drawing Gate 12 means she will be forced to cover slightly more ground than the inside horses. However, as noted in her anatomy breakdown, her family (Fuji Kiseki line) possesses exceptional hock flexibility. This allows her to tolerate the centrifugal force of a wider trip better than a stiffer horse.
- Verdict: At 3.6x (1st Favorite), the market respects her “Nakayama Specialist” pedigree. While the draw isn’t perfect, her neuromuscular coordination on the slope makes her the safest biomechanical bet. She is the “Control Group” of this race—the standard others must beat.
2. Black Chalice (Gate 15 / Odds: 10.8x)
- The Diagnosis: “High Risk, High Reward”
- Biomechanical Outlook: WARNING: She has drawn Gate 15 (The Pink Cap). As discussed in the “Course Analysis,” the short run to Turn 2 places immense stress on horses starting from the outside. To get a good position, she must sprint hard (anaerobic cost) and cut in sharply (shear force on the fetlocks). If she stays wide, she fights physics on every corner.
- Verdict: The market has drifted her to 10.8x (4th Favorite), likely reacting to this difficult draw. Physically, she has the “engine” (Kitasan Black blood) to overcome it, but she is anatomically at the highest risk of “emptying the tank” early. She is a bet on raw talent overcoming physics, which makes her a dangerous but volatile prospect.
3. Big Curren Roof (Gate 4 / Odds: 19.0x)
- The Diagnosis: “The Power & Economy Pick”
- Biomechanical Outlook: OPPORTUNITY: Drawing Gate 4 (The Black Cap) is a massive advantage. While outside horses are fighting centrifugal force, she can hug the rail, minimizing the load on her joints and saving glycogen for the final uphill climb. Her “Power Type” physique is perfect for the rough winter turf on the inside path.
- Verdict: At 19.0x (8th Favorite), she represents the Best Medical Value in the race. The public is underestimating the advantage of a “power horse” in a ground-saving position on a deteriorating track. If she gets a clear path, her “high-torque” engine will drive her up the hill while the others are fading.
Dr. Toku’s Medical Advice: Paddock Signs to Watch
When you are watching the paddock feed (or if you are lucky enough to be at the track), ignore the pretty colors. Look for these specific biomechanical signs.
The “Gaskin Groove” (Power for the Hill)
Look at the hindquarters. Specifically, look at the Gaskin (the muscular area just above the hock). You want to see a deep, defined groove separating the Semitendinosus muscle from the Biceps Femoris.
- Why? This definition indicates developed propulsive power. These are the muscles that extend the hock joint. Without strength here, the horse will stall on the steep uphill finish. If this area looks “flat” or “smooth,” the horse lacks the torque for Nakayama.
Pastern Angulation (Shock Absorption)
Look at the Pasterns (the area between the fetlock and the hoof) on the front legs.
- The Ideal: You want a pastern with a medium slope and good elasticity.
- The Risk: If the pastern is too upright (vertical), the shock from the downhill run will travel straight up the bone column, causing joint pain and hesitation. If it is too long and sloping, the soft tissue (tendons) may overstretch at the bottom of the hill. You want “springy but stable.”
The Quality of Sweat (Stress Analysis)
Young fillies are prone to anxiety. Check the sweat.
- BAD Sign: White, foamy, soapy sweat between the hind legs or on the neck. This indicates high levels of latherin, a protein released during extreme stress or excitement. It correlates with high Cortisol levels. This horse is burning energy before the gates open.
- GOOD Sign: Clear, watery sweat (if it is a warm day) or a “dull sheen” on the coat. As noted with Mejiro Ramone, a “black, glowing” coat indicates a healthy liver and optimal metabolic function.
Dr. Toku’s Final Verdict: The Betting Strategy
Based on the intersection of Veterinary Science, Course Physics, and Market Odds, here is the doctor’s prescription for the 2026 Fairy Stakes.
- The Safe Anchor:#12 Gillie’s Ball
- Reasoning: Proven aptitude for the course’s biomechanical demands.
- The Medical Value Play (The “Buy”):#4 Big Curren Roof
- Reasoning: The odds (19.0x) do not reflect the massive physical advantage of Gate 4 combined with her “rough track” suitability. She is the horse to target for Each-Way (Win/Place) bets or as a key underdog in Exotics.
- The Fade / Caution:#15 Black Chalice
- Reasoning: While talented, the biomechanical “tax” of Gate 15 is heavy. At roughly 10/1 odds, the risk of her being trapped wide or used up early is too high to accept as a primary selection.
Note on Market Leaders: The 2nd favorite, #2 Pied de Lapin (4.4x), has drawn an excellent Gate 2. Sired by Epiphaneia (Stamina) out of a Lord Kanaloa (Speed) mare, she is a formidable opponent for our picks. However, from a value perspective, the gap between her (4.4x) and Big Curren Roof (19.0x) is too wide given the similar tactical advantages they will enjoy.
Good Luck, and Run Sound!
Conclusion
The Fairy Stakes is not a race for the fragile. It is a grueling 1600-meter test that demands:
- Tendon strength to survive the early braking.
- Joint flexibility to navigate the downhill corners.
- Gluteal power to conquer the final incline.
When placing your bets, look for the filly that looks like an athlete, not just a runner. Look for the deep girth, the defined gaskin, and the calm demeanor. That is the horse that will handle the unique veterinary demands of Nakayama.
Good luck with your analysis, and may all horses return to the barn safe and sound.

Comments