Rock Ptarmigan leads wide-open Haneda Hai as Japan dirt classics begin

Rock Ptarmigan enters Haneda Hai with the kind of form line that usually settles a race, yet this one still looks messy. The 3-year-old colt by Siskin gave trainer Koichi Ishizaka an immediate payoff after a switch from turf to dirt, wiring the Poinsettia Stakes at Hanshin and beating Wonder Dean, a colt who later won the UAE Derby and secured a spot in the Kentucky Derby starting gate.

That victory gave Rock Ptarmigan a credible claim as the horse to beat, and his return from a winter break only strengthened it. He came back to win the Keihin Hai by three lengths at Oi Racecourse, proving that Hanshin was no fluke and that he handles the surface where the Japan Dirt Triple Crown begins. If there is a single horse with the clearest recent résumé, it is him.

Even so, Haneda Hai does not read like a race with one obvious answer. The field lacks a true standout, which is why the likely favorite can still be vulnerable to the usual dirt-race variables: the pace scenario, the gate draw, the way Oi’s surface rewards certain running styles, and the class lines separating a proven prep winner from horses still climbing. Haneda Hai often becomes the first serious test for Japan’s best dirt sophomores, and this year those lines are especially hard to sort.

Realize Glint is the most obvious alternative. The Kitasan Black colt, trained by Yoshito Yahagi, cost 150 million yen at the 2024 JRHA Select Sale and already owns a prep win in the Kumotori Sho. That kind of price tag does not guarantee a classic winner, but it does signal the level of confidence behind him. In a race like this, one strong move from a horse with that kind of background can change everything.

That is what makes the Haneda Hai so appealing. It is the first leg of Japan’s Dirt Triple Crown, but it also functions as a crossroads: for Rock Ptarmigan, a chance to confirm that his turf-to-dirt conversion was the right move; for Realize Glint, a chance to justify his investment and pedigree; and for the rest of the field, a chance to exploit a race with no dominant marquee name. With Japan’s dirt classics beginning at Oi, the door is open for a new star to step through.