Although ultralight laptops exist everywhere, and although most manufacturers estimate that around 1.2 kg quite lightJapanese PC makers have spent years shaving off every ounce possible, even going so far as to redesign the case, battery, and internal layout from the ground up.
For this feature, I assembled ten Japanese laptops, each weighing less than 1 kg. These aren't proof-of-concept devices or engineering demos—these are real Windows laptops, with proper keyboards, modern processors, and a wide array of ports that you can buy today.
Yes, some compromises have been made along the way to showcase lightness and slenderness, but Japan has mastered the art of balancing form and function.
Some of these machines are the latest models, others are updated versions of the latest lines, but they all show how far Japanese manufacturers are willing to go when weight is seen as a primary goal rather than an afterthought.
1. FMV UX-K3 from Fujitsu
FMV UX-K3 one of the lightest 14-inch Windows 11 Home laptops are available weighing around 634g in the lightest configuration. It uses carbon fiber and magnesium-lithium alloy to reduce weight while maintaining a rugged feel.
The 14-inch IPS display with a resolution of 1920 x 1200 has an anti-glare coating. Inside is Intel Core Ultra 7 255U processor with 12 cores, 16 GB of memory and 512 GB SSD. The graphics are inevitably integrated.
Ports include two USB-C, one USB-A, HDMI, a microSD card reader, and a LAN port. It also has Wi-Fi 7 and Bluetooth 5.4.
The battery lasts for seven hours of video playback, helped by a small 31Whr battery.
It costs around 280,280 yen, which is approximately $1,804 USD. Japanese Fujitsu store.
2. FMV Zero Lifebook WU5/J3
FMV Zero Lifebook WU5/J3 also weighs around 634g and has a durable carbon body.
It offers a choice of Intel Core Ultra 5 or Ultra 7 processors, up to 64GB of memory, and up to 2TB of SSD storage. The 14-inch display with a resolution of 1920 x 1200 pixels is paired with a full-size HDMI port, two USB-C, two USB-A, Ethernet and a microSD card reader.
There is Wi-Fi 7 and Bluetooth 5.4. This model sacrifices battery capacity for weight, but still provides a full Windows experience.
The price depends on the configuration on the site Fujitsu online store, operating only in Japan.from 154,800 yen, equivalent to US$997 for base configurations.
3. Dynabook Portégé Z40L-N
The Dynabook Portégé Z40L-N weighs just under 1kg and is suitable for users who want an exceptionally lightweight business laptop. It features a 14-inch 1920 x 1200 display, Intel Core Ultra family processors, up to 32GB of LPDDR5X memory and up to 1TB of SSD storage. Graphics are integrated.
It also includes USB-C, USB-A, HDMI, Ethernet with Thunderbolt 4 support, and a microSD card reader. Wireless connectivity is provided by Wi-Fi 7 and Bluetooth 5.4.
In our reviewWe praised its user-replaceable battery, excellent ports, built-in AI features, and high durability rating, which we say makes it “a serious contender in the world of portable laptops, especially for those on the go all day.”
4. Dynabook RA73/VY
This 13.3″ Dynabook Laptop weighs approximately 849g in its lightest configuration and has a magnesium alloy body.
He offers AMD Ryzen 5 or Ryzen 7 processors, up to 32 GB of memory and up to 1 TB of PCIe SSD storage. The 1920 x 1200 resolution display keeps it compact without making it feel cramped.
Ports include two USB-C with Thunderbolt 4 support, two USB 3.2 Gen 1 ports, HDMI, Gigabit Ethernet, a microSD card reader, and a headphone jack. There is support for Wi-Fi 7 and Bluetooth 5.4.
Some trims offer additional security and connectivity features such as fingerprint recognition and cellular modems. Prices in Japan vary depending on the configuration, but for ultraportable laptops they are typically in the mid to high range.
5. iiyama PC STYLE-14FH124-C5-UCEX
Weighing less than 1 kg, this 14-inch laptop features an Intel Core 5 120U processor with 10 cores and 12 threads, coupled with 8GB of memory and a 500GB NVMe SSD in the base configuration.
The 1920 x 1080 resolution display is glare-free, and graphics are handled by an integrated Intel solution.
It includes Thunderbolt 4, USB 3.2 Gen2 and Gen1 ports, HDMI, microSD slot, Wi-Fi 6E and Bluetooth.
Prices for the basic version in Japan are from the equivalent of $707 and above.
6. iiyama PC STYLE-14FH124-C5-UCFX
It's a slightly updated version of the previous laptop, weighing the same under 1kg, but with 16GB of memory and a 1TB SSD.
It uses the same Intel Core 5 120U processor and 14-inch FHD display as the base model. The port layout is identical to Thunderbolt 4, USB 3.2 Gen2, USB 3.2 Gen1, HDMI and microSD.
It also has the same wireless support. Prices for this configuration in Japan are usually higher than the base model. often around $835.
7. Dynabook G8, G6 and GS
Dynabook G Series Covers three closely related 13.3-inch laptops they all have the same goal: to maintain a weight of around 849g without sacrificing everyday functionality.
The G8, G6 and GS models share the same basic chassis and layout, with the differences largely coming down to processor level and configuration.
Most versions use Intel Core Ultra processors: the G8 is usually paired with Core Ultra 7, and the G6 and GS with Core Ultra 5 options. Memory is 16 GB LPDDR5X, SSD storage is 512 GB. Integrated graphics allow you to monitor temperature and power consumption.
The display across the line is a 13.3-inch anti-glare panel with a resolution of 1920 x 1200 pixels. Despite the light weight, the selection of ports is good. It includes two USB-C ports with Thunderbolt 4 support, two USB-A ports, HDMI, Ethernet, a microSD slot, and a 3.5mm audio jack. Wireless connectivity includes Wi-Fi 6E and Bluetooth 5.3.
The price depends on the model and configuration.
8. Dynabook RZ/MX
The Dynabook RZ/MX differs from the lighter G series (above) in that it has a 14-inch display. The weight is around 899g, making it one of the lightest laptops in its size class.
The chassis uses lightweight alloys while maintaining a more traditional business laptop shape.
It features an Intel Core Ultra 7 processor paired with Intel Arc graphics, which helps it handle heavier visual workloads than most ultralight PCs.
Typical configurations include 16GB of memory and a 512GB SSD. The 14-inch display has a resolution of 1920 x 1200 pixels, a 16:10 aspect ratio and anti-glare coating.
Ports include two USB-C with Thunderbolt 4, USB-A, HDMI, Ethernet, a microSD reader, and a headphone jack. Wireless support covers Wi-Fi 6E and Bluetooth 5.3.
9. Panasonic Let's celebrate SC
Let's celebrate Panasonic's SC uses a smaller 12.4-inch display, but focuses on durability, battery flexibility and connectivity rather than chasing the lowest possible weight. Despite this, its weight is still about 900 g.
The display has a resolution of 1920 x 1280 and an aspect ratio of 3:2, which is suitable for working with documents and viewing. Current configurations feature Intel Core Ultra processors, including Core Ultra 5 and Core Ultra 7 variants, paired with 16GB of memory and SSD capacities starting at 512GB. Graphics are integrated.
A standout feature is the removable 56Whr battery, which is rare in modern ultralight laptops. Port selection includes USB-A, two USB-C ports with Thunderbolt 4 support, HDMI, and full-size Ethernet.
10. iiyama PC STYLE-14FH124-i5-UXPX-CP
Another configuration weighing less than 1 kg from the iiyama PC line. This model Comes with an Intel Core i5-1335U processor with 16GB of memory and a 500GB SSD. The 14-inch Full HD display and lightweight design make this model portable without the need for everyday essentials.
The port selection includes Thunderbolt 4, USB, HDMI, microSD and audio, as well as Wi-Fi 6E and Bluetooth.
Prices for this particular configuration in Japan are generally in the same range as other mid-range iiyama models, at around $1,000.
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