Overview

This article covers 3面コンセントエクステンダー ナイトライト付き - POWRUI マルチプラグコンセント 5つのコンセントと4つのUSBポート(1 USB-C), the POWRUI 3-Side Outlet Extender with Night Light. It plugs straight into a wall outlet and turns it into five AC outlets and four USB ports (three USB-A and one USB-C).

It also has surge protection rated up to 1680 joules and an LED night light that turns on by itself when the room gets dark.

Here is the short answer. It is a good fit if you want to charge small gadgets and have a night light at the bedside or in a hallway, all from one outlet.

It is not a good fit for fast laptop charging or for running several power-hungry appliances.

One more thing to know up front. The listing gives the plug as a grounded NEMA 5-15P and the maximum power as 1875W (15A).

Both are North American ratings. This article explains what those numbers mean if you use it in a Japanese home.

Compatibility Guide

Plug type (check this first)

The listing gives the plug as NEMA 5-15P: two flat blades plus a round ground pin. Most living rooms in Japan have two-slot outlets with no hole for the ground pin, so the plug may not go in.

Grounded three-slot outlets, often found in kitchens and washrooms, do fit. Check the outlet where you plan to use it, and check the product photos to confirm the real plug shape.

You could use a 3-to-2 prong adapter, but then the unit is not grounded. Many surge protection circuits work by sending excess voltage to ground, so without a ground connection the protection may not work fully.

If surge protection is the reason you are buying it, this matters.

Voltage and power

The input is listed as 100-240VAC. However, extenders like this normally pass the wall voltage straight through to the AC outlets.

They do not convert voltage. Think of the 100-240V figure as the range the USB charging circuit accepts.

The unit cannot replace a voltage converter when you travel abroad.

The 1875W maximum comes from the North American rating of 15A at 125V. A typical Japanese wall outlet is rated 15A at 100V, which works out to about 1500W in total.

Having five outlets does not mean you can run a hair dryer, a microwave and an electric kettle at the same time.

USB output

Port Count Output
USB-A 3 5V/2.4A each (about 12W)
USB-C 1 5V/3A (about 15W)

Every USB port puts out 5V only, so there is no USB PD or other higher-voltage fast charging. The listing states that the USB-C port does not support devices that need 14-22V, which includes most laptops.

The ports are fine for phones, earbuds, smartwatches and power banks. A recent phone will still charge faster on a dedicated PD charger.

The listing does not give a combined USB output for all four ports at once, so check the product page if you plan to charge several devices together.

Size and mounting

The five AC outlets are spaced 2.1 inches apart, so bulky adapters are less likely to block the outlet next to them.

Because the unit hangs directly on the wall outlet, that outlet carries the full weight of the extender and everything plugged into it. Several heavy adapters can tilt the unit or pull it partly out.

Push the plug in all the way and move heavy adapters to other outlets.

Product Info

rmation

As of October 1, 2026, Amazon.co.jp listed it at ¥5,229.

Prices change often with sales and stock, so check the product page for the current price before you buy. At the same time, Amazon showed a rating of 4.7 out of 5 from 119 reviews.

That is a fairly small number of reviews, so treat the rating as a rough guide and read the negative reviews too.

Main specifications:

  • AC outlets: 5
  • USB ports: 4 (3 USB-A, 1 USB-C)
  • Surge protection rating: 1680J
  • Input: 100-240VAC
  • Maximum current and power: 15A, 1875W
  • Night light: turns on automatically from dusk to dawn, with a 3-level touch dimmer

The unit carries ETL certification, a safety mark based on North American standards.

Power strips sold in Japan are required to carry the PSE mark. The data for this product does not mention PSE, so check the unit or the product page for it.

POWRUI is a fairly new brand. The Amazon listing names POWRUI as the manufacturer and QAPI as the seller and shipper.

According to the original listing, it comes with a 12-month warranty and a 30-day return window, and the box contains only the unit and a manual.

Wall-Plug vs. Extension Cord vs. USB Charger

Products that add outlets fall into three broad types. This one plugs directly into the wall.

With no cord, it looks tidy and there is nothing to trip over, but it can only go where your wall outlet is. If you need power on a desk or away from the wall, an extension-cord strip is more practical.

If USB charging is your main goal, a desktop charging station with PD support is also worth a look. This unit is slower because its USB ports stop at 5V.

What it offers is AC outlets, USB ports, surge protection and a night light together, all from one wall outlet. Buy it if that combination is what you want.

  • People who want to charge phones and earbuds and have a night light at the bedside or in a hallway, all from one unit. The light turns on by itself when it gets dark and has 3 brightness levels.
  • People who want more outlets at a grounded three-slot outlet, such as on a kitchen counter or in a washroom.
  • Households that charge several small devices at once. It has three USB-A ports and one USB-C port.
  • People who use bulky AC adapters. The 2.1-inch spacing makes it less likely that one adapter blocks the next outlet.

Before You Buy

It may not fit two-slot outlets. The listing gives the plug as a grounded NEMA 5-15P, which may not fit the two-slot outlets common in Japanese living rooms.

Check the plug shape in the product photos before you buy. Using an adapter that removes the ground may weaken the surge protection.

The ratings are for North America. The unit is ETL certified, and the 1875W figure assumes North American voltage.

In Japan, plan for about 1500W in total. The data does not mention a PSE mark, so check the unit or the product page for it.

The USB ports do not fast charge. Every port is 5V only, and USB-C tops out at 5V/3A (about 15W).

If you expect to charge a laptop or fast-charge a phone, you will be disappointed.

The night light may bother some people. It turns on automatically in the dark, which some people find distracting in a bedroom.

The data mentions only a 3-level dimmer and does not say whether the light can be switched off completely. If you are sensitive to light, check the product page or reviews.

Surge protection has limits. The 1680J figure is a rough measure of how much surge energy the unit can absorb.

Surge protection parts are generally understood to wear down each time they absorb a surge. A large surge, such as from a nearby lightning strike, may get through.

When a thunderstorm is close, unplugging valuable devices is the safest option.

Check the listing details yourself. This is a North American product sold on Amazon Japan.

Before it arrives, confirm that the name, photos and specifications match the outlets in your home.

FAQ

Q. Will it fit a standard Japanese wall outlet? A.

The listing gives the plug as a grounded NEMA 5-15P. It fits grounded three-slot outlets but may not fit ordinary two-slot outlets.

Check the product photos to confirm the plug shape.

Q. Can the USB-C port charge a laptop? A.

Assume it cannot. The USB-C port outputs 5V/3A, and the listing says it does not support devices that need 14-22V.

Use a PD charger for a laptop.

Q. Can I take it abroad? A.

The input is listed as 100-240V, but the AC outlets normally pass the wall voltage straight through. It is not a voltage converter, and it may not fit outlets in other countries.

Q. Can I adjust the night light? A.

Yes. It has a 3-level touch dimmer and turns on automatically from dusk to dawn.

The data does not say whether it can be switched off completely.

Q. Is it enough protection against lightning? A.

It has 1680J surge protection, but it cannot stop every lightning surge, and it needs a proper ground connection to work. The most reliable option is to unplug your devices when a storm is close.

Product Disclosure (Amazon)

  • Manufacturer: POWRUI
  • Seller: QAPI
  • Fulfilled by: QAPI
  • ASIN: B0FD6ZCFGH
  • Note: This article covers a manufacturer-made product based on Amazon listing details.