2025年百万石賞】過去傾向から徹底分析！プロが教える鉄板予想の3大ポイント

Introduction: Unlocking the Secrets of the Million Stone Prize

For decades, the Million Stone Prize (Hyakumangoku Sho) has captivated horse racing fans as the premier event at Kanazawa Racecourse. As the definitive championship for older horses in the first half of the season, it boasts a rich history and prestigious status, consistently delivering unforgettable drama. The 2025 Million Stone Prize promises another thrilling spectacle. In this in-depth article, we provide an expert analysis of past race trends, distilling them into three crucial prediction points designed to sharpen your betting strategy. We hope this analysis serves as a valuable asset for your wagers.

Section 1: The Million Stone Prize – Race Overview and Kanazawa Racecourse Characteristics

To accurately formulate your predictions for the Million Stone Prize, a foundational understanding of the race itself and the unique characteristics of Kanazawa Racecourse is absolutely essential.

1.1 History and Prestige of the Million Stone Prize

The Million Stone Prize is a historic graded stakes race established in 1958. Since its inception, the race has almost consistently been held in June, solidifying its position as the premier championship for older horses in the first half of the Kanazawa racing season. It is counted among Kanazawa Racecourse’s “Four Major Stakes” (the others being the Hakusan Daishoten, Hokkoku Okan, and Chunichi Hai), underscoring its profound significance to local racing stakeholders and fans alike. Each year, the race attracts virtually the best horses from Kanazawa, ensuring a high-caliber and intensely competitive contest.

The consistent June timing of this race is a critical factor for predictions. Specific seasonal race timings often create predictable patterns in horses’ conditioning and race scheduling. This implies that stables tend to follow similar preparation strategies for this major target, which in turn enhances the reliability of historical data analysis.

1.2 Race Conditions (Distance, Eligibility, Weight)

The current race conditions for the Million Stone Prize are as follows:

Distance: Dirt 2100m. A notable change occurred in 2016 when the distance was shortened from the traditional 2300m to 2100m. This alteration potentially shifted the race’s nature and the aptitudes required, making data from 2016 onwards particularly relevant for current predictions. Concurrently with this distance change, the Chunichi Hai, previously run at 2300m, was also shortened to 2000m, eliminating all 2300m races at Kanazawa Racecourse. This means Kanazawa-affiliated horses no longer specifically train or follow a unique race schedule for the uncommon 2300m distance, placing a more direct emphasis on their adaptability to 2100m.
Eligibility: Thoroughbreds aged 3 years and older, exclusively affiliated with Kanazawa Racecourse. The restriction to local Kanazawa-affiliated horses is a crucial element for predictions. With no invading horses from other regions, the race more purely reflects course suitability at Kanazawa and the relative strengths among local competitors. Consequently, past performance at Kanazawa and the prowess of local jockeys and stables become significant determinants of victory.
Weight: Separate Weights (Bettei Juryo). 3-year-olds carry 54kg, 4-year-olds and older carry 57kg, with fillies and mares receiving a 2kg allowance from their respective base weights. The 2kg allowance for fillies and mares can significantly impact race outcomes, demanding careful consideration when formidable female contenders are entered.

1.3 Kanazawa Racecourse Course Guide

Understanding the course characteristics of Kanazawa Racecourse, the stage for the Million Stone Prize, is indispensable for refining your predictions.

Basic Information: Kanazawa Racecourse features a 1200m per lap, right-handed dirt course. The straightaway measures 236m, which is standard for local Japanese racecourses, and there is no significant elevation change across the course. This flat course profile suggests that sustained speed, intelligent pace distribution, and adept cornering are more crucial than attributes like climbing power or downhill acceleration, which are relevant on courses with gradients.
Track Surface Change: In 2021, the entire track surface was replaced, changing from the traditional river sand from Toyama Prefecture to mountain sand from Aichi Prefecture. This is a highly significant and undeniable alteration. Generally, a change in sand type affects the track’s cushioning, drainage, and hardness, influencing overall race times and advantageous running styles. Indeed, the winning time for the 2020 Million Stone Prize was 2 minutes 18.8 seconds, whereas after the sand change, winning times from 2021 to 2024 consistently fell in the 2 minutes 14-second to low 2 minutes 15-second range. This indicates a likely acceleration of the track. Therefore, it is vital to remember that race times and unfolding race patterns may differ significantly between the periods before and after 2021.

Section 2: In-Depth Race Analysis! Million Stone Prize Trends

This section delves deeper into the race trends, focusing particularly on Million Stone Prize results since 2016, when the distance was changed to 2100m.

2.1 Analysis of Recent Winners

Haku-san Amazones’ Absolute Dominance: From 2021 to 2024, the mare Haku-san Amazones achieved an incredible feat by winning the Million Stone Prize four consecutive times. In all these victories, she was ridden by jockey Hiroto Yoshihara, trained by Kazuyoshi Kato, and delivered as the overwhelming first favorite. Such long-term dominance by a single horse is rare, and her exceptional presence has profoundly shaped the race results during this period.
Winners from 2016–2020: Examining the winners before Haku-san Amazones’ emergence and after the distance change to 2100m, we find: South American (2020), Timothy Blue (2019), Meiner Reborn (2018), Tosho Pride (2017), and Jungle Smile (2016 – a horse that also won multiple times during the 2300m era). By comparing the age, sex, and popularity of these winners, we can glean insights into race trends during periods without Haku-san Amazones’ absolute presence. The existence of a champion like Haku-san Amazones unequivocally transforms the race dynamic. Her winning streak is a powerful trend in itself, but should she not run in 2025, or if her absolute power wanes, the race could revert to the more competitive scenarios seen from 2016 to 2020. Therefore, understanding trends from both eras is crucial.

2.2 Performance of Favorites and Longshots

Haku-san Amazones Era (2021–2024): In these four years, the first favorite, Haku-san Amazones, secured victory every time, demonstrating a consistent reliability of top-billed horses.
Analysis of 2016–2020: Conversely, the five years from 2016 to 2020 present a different picture:
- 2020: South American (6th favorite)
- 2019: Timothy Blue (2nd favorite)
- 2018: Meiner Reborn (4th favorite)
- 2017: Tosho Pride (6th favorite)
- 2016: Jungle Smile (6th favorite)
During this period, marked by the absence of an absolute favorite, horses other than the first favorite frequently won, with longshots as significant as the 6th favorite occasionally emerging victorious. This suggests that the races were more evenly matched, often presenting valuable betting opportunities. The characteristic of the race being limited to Kanazawa-affiliated horses might contribute to these moderate upsets. Local experts and avid fans may possess a keen understanding of each horse’s condition and the stable’s intentions, which isn’t always fully reflected in the odds, leading to strong performances from horses generally overlooked by the public.

2.3 Age and Gender Trends

Age: Haku-san Amazones clinched the Million Stone Prize between the ages of 4 and 7. Examining the ages of other winners since the 2100m change reveals South American at 5, Timothy Blue at 5, Meiner Reborn at 8, Tosho Pride at 7, and Jungle Smile at 10 (at 2100m). This clearly indicates that experienced horses aged 5 and older have predominantly featured among the winners. While 3-year-olds are eligible to run (carrying 54kg), historical data since 2007 (post-2100m change) shows no victories for 3-year-olds, with the youngest winner being 4. This suggests the “wall of older horses” is formidable.
Gender: Haku-san Amazones’ four consecutive wins emphatically proved that fillies and mares can compete on equal or superior terms against colts and geldings. She effectively maximized the 2kg allowance for fillies and mares (55kg for 4-year-olds and older mares compared to 57kg for colts/geldings). While other recent winners have primarily been males, a top-class mare can leverage this weight difference into a significant advantage. For the 2025 Million Stone Prize, this point should be thoroughly considered if a proven mare is among the entries.

Table 1: Past 10 Years (2015-2024) Million Stone Prize Results Summary

YearWinnerSex/AgeWeightJockeyTrainerPopularityTime2nd Place HorseNotes2024Haku-san AmazonesF755.0kgHiroto YoshiharaK. Kato12:14.9(No Information)2100m2023Haku-san AmazonesF655.0kgHiroto YoshiharaK. Kato12:15.0(No Information)2100m2022Haku-san AmazonesF555.0kgHiroto YoshiharaK. Kato12:14.7(No Information)2100m2021Haku-san AmazonesF455.0kgHiroto YoshiharaK. Kato12:15.3(No Information)2100m2020South AmericanC557.0kgD. KuriharaH. Kaneda62:18.8(No Information)2100m2019Timothy BlueC557.0kgS. HatakaH. Kaneda22:17.8(No Information)2100m2018Meiner RebornC857.0kgM. AoyagiS. Takahashi42:17.6(No Information)2100m2017Tosho PrideC757.0kgA. KatsuyamaS. Sato62:20.2(No Information)2100m2016Jungle SmileC1057.0kgH. TachiH. Kaneda62:20.4(No Information)2100m2015Jungle SmileC956.0kgJ. HiraseH. Kaneda22:31.6(No Information)2300m

Source: Data compiled from official race results. Information for 2nd place horses was not directly available in the primary data source and is indicated as “No Information”. Please note that some sources might list “Haku-san Amazones” as the 2nd place horse in 2022, but this typically refers to a different horse with the same name, or an error, as a single horse cannot be both 1st and 2nd. The table above adheres to the primary information where available.

This table provides a comprehensive overview of recent race results, allowing for a visual grasp of winning horse profiles, popularity trends, and the impact of the 2016 distance change and 2021 track surface alteration on race times.

Section 3: The 3 Key Prediction Points for the 2025 Million Stone Prize

Building upon the thorough analysis above, we propose three critical points that should be heavily weighted when predicting the outcome of the 2025 Million Stone Prize.

Point 1: Reliability of Proven Horses – Focus on “Kanazawa Course Specialists” and “Repeaters”

In the Million Stone Prize, horses with a strong track record at Kanazawa Racecourse, particularly those with previous strong performances in this very race, frequently excel again.

Strength of Repeaters: Beyond Haku-san Amazones’ impressive four consecutive wins, Jungle Smile also secured multiple victories (in 2016 at 2100m, and between 2010–2012, 2015 at 2300m), and Namura Daikichi achieved back-to-back wins in the 2300m era (2013, 2014). These instances demonstrate that horses capable of winning this race possess superior course and race suitability, making them strong candidates for repeat success in subsequent years.
Kanazawa Course Specialists: Even if a horse hasn’t won the Million Stone Prize, those consistently contending for top honors in graded stakes or special allowance races at Kanazawa Racecourse are formidable contenders. As the race is exclusively for Kanazawa-affiliated horses, the advantage of a horse intimately familiar with the local course is substantial. Kanazawa Racecourse is a flat, relatively compact 1200m per lap course, and the 2100m Million Stone Prize covers approximately 1 and 3/4 laps. This course configuration demands agility, keen race sense, and adaptability to Kanazawa’s unique track surface (especially the mountain sand since 2021). Horses that have previously demonstrated these qualities with strong results are highly likely to perform at a similar level again.

Point 2: Thorough Analysis of the Most Important Step Race: The Toshie Hai

When forecasting the Million Stone Prize, the results of its key prep race, the Toshie Hai, serve as an extremely crucial indicator.

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