What is 電子レンジ調理器 半熟たまご風 W?
Meet the little kitchen tool that's quietly breaking the internet in Japan. The 電子レンジ調理器 半熟たまご風 W (Microwave Soft-Boiled Egg Cooker W) is a compact, single-egg cooking gadget from Daiso — priced at just ¥110 (roughly $0.75). Yes, that's less than a vending machine drink for a tool that could genuinely change your morning routine.
Made entirely in Japan, the unit consists of two parts: a strainer basket (ザル) and the main body — both crafted from polypropylene rated from −20°C to 140°C. That wide thermal range means it handles the freezer, the microwave, and everything in between without warping or cracking. The design is purposefully minimal: no moving parts, no complicated assembly. One egg goes in, a little water joins it, and the microwave does the rest. The whole set ships as a single unit in the package.
Size-wise, the product listing notes compact dimensions, making it easy to tuck into a crowded utensil drawer or even a small apartment kitchen. It's designed for exactly one egg at a time, which keeps portion control effortless. The "W" in the name signals an updated version — refined for even more reliable results than its predecessor. For anyone who has ever over-boiled an egg or stood over a pot watching the clock, this little gadget feels almost unreasonably convenient.
Source: daisonet.com
How to Use It — Hack Ideas
Primary Use — The Soft-Boiled Egg in 80 Seconds:
The process is refreshingly simple. Add a small amount of water to the main body, place your egg inside, poke a small hole in the yolk end with a toothpick (crucial — this prevents the egg from bursting), snap on the strainer lid, and microwave for approximately 1 minute 20 seconds. Let it rest for a minute, and you've got a beautifully jammy, ramen-topping-worthy soft-boiled egg. No boiling water. No timer anxiety. No mess.
Hack #1 — Instant Ramen & Rice Bowl Upgrade:
Keep the cooker right next to your microwave as a permanent station. Every time you make instant ramen, udon, or a donburi rice bowl, drop in an egg while the noodles are soaking. By the time your bowl is dressed and ready, the egg is done. Zero extra effort, maximum visual payoff.
Hack #2 — Meal-Prep Egg Station:
The polypropylene body is freezer-safe down to −20°C. Cook a soft-boiled egg, peel it while warm, drop it into a small zip bag with soy sauce and mirin for a quick shoyu tamago (soy-marinated egg), and refrigerate overnight. Use within three days as a grab-and-go protein for salads, sandwiches, or bento boxes. A whole week of elevated lunches, powered by a ¥110 gadget.
Reviews & Verdict
This product has developed a genuine fan base online — and it's easy to see why. Reviewers consistently highlight the time-saving factor, with multiple sources confirming the under-two-minute cook time as accurate. Busy mornings, small kitchens, and solo-living households are the most enthusiastic demographics. One common sentiment: "I wish I'd bought this sooner."
The SNS buzz (particularly on Japanese Instagram and YouTube) has kept this item cycling in and out of stock, which itself is a form of social proof. A YouTube comparison video testing the microwave method versus the traditional stovetop approach found the results surprisingly competitive — the texture of the yolk was satisfyingly soft, though stovetop purists may notice a subtle difference in white firmness.
A few caveats worth knowing: microwave wattage varies, so your first attempt may need a 10–15 second adjustment. The product is designed for one egg only — if you're feeding a family, you'll want multiple units (which, at ¥110 each, is still a great deal). Also, don't skip the yolk-piercing step. Every reviewer who skipped it learned the hard way.
Overall, this is a product that solves a real daily friction point with elegant simplicity. It's no surprise it's become one of Daiso's most talked-about kitchen items.
Value Score: 92/100
At ¥110, the 電子レンジ調理器 半熟たまご風 W earns near-perfect marks: it genuinely delivers on its promise, the Japan-made polypropylene construction feels durable and safe, and the hack potential — from ramen toppings to marinated meal-prep eggs — punches well above its price point. A true Daiso gem — don't miss this one.
