What is オーブントースター用スチーム皿(丸)?
Meet your new morning ritual upgrade. The オーブントースター用スチーム皿(丸) — or "Round Steam Tray for Toaster Ovens" — is a deceptively simple little dish that promises to revolutionize the way you toast bread. At just ¥110 (tax included), this compact kitchen addition measures approximately 5cm × 5cm × 2cm, making it small enough to slide right alongside your bread in even the tightest toaster oven cavity.
Made in China and sold as a single unit, the concept is refreshingly no-fuss: fill the dish with water, place it next to your bread in the toaster oven, and let the steam do the work. As the oven heats up, the water evaporates and creates a mini steam environment — mimicking the professional deck ovens used in artisan bakeries. The result? A toast that's fluffy and moist on the inside, satisfyingly crispy on the outside. That contrast — the Japanese call it "ふんわりサクサク" — is exactly what separates premium toast from the sad, dried-out slices most of us settle for every morning. The material appears to be heat-resistant ceramic or enamel-coated metal (consistent with Daiso's kitchenware lineup), built to withstand standard toaster oven temperatures without issue.
This product sits squarely in Daiso's Kitchen & Dining category and has clearly struck a nerve with home bakers and breakfast enthusiasts alike. The round shape is intentional — it fits neatly without taking up precious rack space — and the shallow 2cm depth holds just enough water to generate effective steam for a standard toasting cycle. For ¥110, the engineering-to-price ratio is, frankly, absurd in the best possible way.
Source: daisonet.com

How to Use It — Hack Ideas
Primary Use — The Perfect Toast Method:
Fill the steam tray about halfway with water. Place it on the rack beside your bread slice. Toast as usual. That's it. The steam circulates during the bake cycle, keeping the bread's interior soft while the direct heat crisps the surface. Thicker slices of shokupan (Japanese milk bread) benefit enormously — you'll notice the difference from the very first try.
Hack #1 — Reheat Leftover Rice or Steamed Buns:
Don't limit this to bread! Place the water-filled steam tray next to leftover onigiri, frozen steam buns (nikuman), or even day-old dinner rolls. The added moisture prevents rubbery textures and brings starchy foods back to life without a microwave's uneven heating. It's a lazy but genuinely effective reheating hack.
Hack #2 — Aromatherapy Diffuser for Your Toaster Oven Cavity:
Going a little left-field here — but add a drop of food-safe citrus peel or a tiny sprig of rosemary to the water before heating. The steam carries a gentle fragrance through the kitchen while your bread toasts. It won't scent your whole apartment, but it adds a charming café atmosphere to your morning routine. Just make sure to clean the tray thoroughly after.
Reviews & Verdict
Community response to this product has been genuinely enthusiastic. Multiple reviewers describe it as a discovery that permanently changed their morning toast routine — phrases like "毎朝これで焼くようになりました" ("I now use this every single morning") speak volumes. For a ¥110 item, that kind of habitual adoption is rare and telling.
Comparisons to high-end premium toasters — some costing tens of thousands of yen — pop up repeatedly in reviews. The fact that a tiny water dish can approximate results from a ¥20,000+ Balmuda-style steam toaster is the kind of "¥110 for THIS?!" moment Daiso lives for. Home bakers who make their own bread also report noticeably better crusts when using the steam tray during the final toast cycle.
A few caveats worth noting: the tray is small, so it works best in compact toaster ovens where the steam stays concentrated. In larger ovens, the effect may be more subtle. Also, mineral deposits from water can build up over time — a quick vinegar rinse periodically keeps it performing well. Overall, this is a product that over-delivers at every level. If you toast bread even occasionally, this earns permanent toaster oven real estate.
Value Score: 92/100
Near-perfect price-to-quality ratio with a concept so effective it rivals appliances costing hundreds of times more; the only minor knock is that results can vary slightly depending on toaster oven size. A true Daiso gem — don't miss this one.