120V to 100V Voltage Converter 1600watts Step Down toroidal Voltage Converter for Japan appliances Used in US［CE, CQC Certified］

This review is after two years of daily use. I’ve been using this product everyday with my Japanese made hair dryer. It has been working pretty sturdily and has never caused any issues so far. Body design is sleek and clean: easy to wipe clean. No complaints!

Purchased this to use with my vintage Japan-only Yamaha turntable (YP-511). Works great. It hasn’t indicated to me the wattage usage it just shows 0 on the display but this is likely due to the turntables very low wattage (something like 3w if I recall). What matters most to me is that the current coming through this is correct. I’ve tested with a meter and it is accurate so I’m a happy camper. This model might seem like overkill for 3w but I do intend to purchase a set of Japan-only speakers and amplifiers that I would also plug-in. Also of note, I received an email from this company inquiring whether or not I had any questions or concerns about the product so I feel like there’s a certain level of assurance that the company would stand behind their product. So overall I am content and felt like this was a great purchase.

It’s a bit heavy and bulky, but it gets the job done. It has two outlets and a digital display showing how many watts you're using. Trust me, this is extremely important—here’s why:My wife bought some Japanese appliances and was told by the store staff that they'd only work with 100V (the Japanese standard voltage). I thought it would be a great idea to buy a small travel converter to solve the issue. It did not.When we got home, the small converter overheated and shut down after 5-7 seconds. The voltage was correct, but the wattage wasn’t. (I’m not an electrician, so I didn’t check the wattage when buying the small converter.)We thought we’d bought a brick, but there was still hope. After a bit of research, I found this converter. So go ahead, buy your Japanese appliances with confidence, because this will keep you safe. Just make sure to check your appliance’s wattage—it should be LESS than what this converter can handle. If your appliance needs more power, you’ll need to buy a higher-capacity converter.

Works great

Nice design, does not take up to much space, I like the on/off button. Works as designed.

If you've bought power-hungry electronics equipment in Japan and you're worried about our US voltage causing damage over time (you should be!), the UMI 120V to 100V Converter may be your best bet. I've lived in Japan and Europe for many years and have used many converters (220V, 110V, 100V), but most of them sported a bulky, ugly, industrial design or were slim-lined solutions that couldn't handle higher wattage appliances.I've used the 120V to 100V step-down model for a few weeks for a Japan-made Tiger "donabe" rice cooker with a 1,000 watt rating and have been operating it without issue twice a week or more. The UMI Converter looks good -- almost like a small, slim desktop PC, and has a clearly labeled input and output outlet. I have it permanently situated behind my rice cooker along the backsplash of my kitchen and it blends in nicely. It's easy to turn off when not in use and has clear read-outs for voltage and wattage on the front. It's not cheapIn case you're confused, even though most US appliances are rated for 110V, if you measure the voltage output of your outlets you may actually encounter 120V and 125V current. Since my rice cooker is designed for sale in Japan only and has electronic logic modules/timers/displays and speech output, it probably doesn't take kindly to voltage fluctuations. With 1,600 Watt capacity, it can handle my 1,000 Watt cooker without problems and guarantee a long lifespan.I'll report back in in case the converter bows out prematurely, but so far, it's exactly what I was looking for.

It works with our Panasonic hairdryer, which was purchased in Japan.

I bought Tiger Houbidaki Rice cooker in April 2025 in Japan, this little step down machine works great with that. I'm so glad to buy this one!!