Xiaomi Japan will release the high-end wearable Xiaomi Watch S5 46mm and the Xiaomi Buds 6 true wireless earbuds in Japan on Thursday, June 4, 2026[1]. Pre-orders opened at 22:00 on Thursday, May 28, the same day as the global announcement. The smartwatch pairs a 2500-nit OLED display with up to 21 days of battery life, while the earbuds support Hi-Res Lossless playback via aptX Lossless. Both models carry specifications worthy of their flagship positioning.

Xiaomi Watch S5 46mm: 2500-nit OLED and Up to 21-Day Battery

The Xiaomi Watch S5 46mm adopts an ultra-thin 2.6mm bezel that is 40 percent slimmer than the previous generation, improving the screen-to-body ratio by 5.7 percent compared with its predecessor[1]. It features a 1.48-inch OLED display with a resolution of 480 by 480 pixels and a peak brightness of 2500 nits[1]. The high brightness keeps the screen clear even outdoors, making it easy to check notifications and the time at a glance.

The watch is powered by an 815mAh Xiaomi Surge Battery[1]. Xiaomi states it lasts up to 21 days in light use and 14 days in typical use, reducing the need for frequent charging[1]. Note that these figures are reference values measured under specific conditions defined by Xiaomi, and actual battery life varies with usage and settings[1].

The body is made of 316L stainless steel for durability and corrosion resistance[1]. It weighs about 46g and measures 10.99mm thick excluding protrusions, keeping it light and slim despite its high-end build[1]. A seamless bezel and a multi-faceted, polished crown give it a premium look.

Heart-Rate Algorithm 2.0 and High-Precision GPS Refine Health and Fitness Features

The health features have also been strengthened. By combining a 4-LED, 4-PD heart-rate and blood-oxygen sensor with a newly designed Heart Rate Algorithm 2.0, the company says heart-rate measurement accuracy has risen to 98.40 percent[1]. For sleep tracking, Sleep Algorithm 2.0 improves the detection accuracy of falling asleep and waking by 11 percent and sleep-stage monitoring accuracy by 14 percent[1]. In partnership with international sleep institutions, it also provides personalized sleep-improvement advice[1]. That said, these functions are not intended for medical use[1].

For fitness, the watch supports more than 150 sport modes[1]. The cycling mode in particular has evolved significantly, displaying heart rate, speed, and distance in real time and offering ride analysis reports afterward[1]. A new-generation dual-frequency GNSS chip tracks outdoor routes with high precision[1]. Route navigation that guides you to your destination and a route-deviation alert that warns you when you stray off course further enhance its usability outdoors[1].

Xiaomi Buds 6: Lightweight Design and aptX Lossless Support

Released alongside the watch, the Xiaomi Buds 6 stand out for their ultra-light semi-in-ear design weighing just 4.4g per earbud[1]. The stem is 12 percent slimmer to reduce pressure on the tragus, the sound outlet is 11.3 percent thinner, and the contact area is 8.8 percent larger to distribute pressure evenly during wear[1]. The ergonomic shape prioritizes comfort even during long listening sessions.

For sound quality, the earbuds support 24-bit/48kHz Hi-Res Lossless audio[1]. Through aptX Lossless, they achieve a transmission rate of up to 2.1Mbps, conveying more than six times the data of conventional wireless audio[1]. Tuned with input from Harman, the setup aims to reproduce sound in realistic detail. Despite the semi-in-ear form factor, they support noise cancellation, suppressing ambient noise while keeping important sounds such as voices and car horns audible[1].

During calls, three microphones and an AI noise-cancellation algorithm work together to pick up the voice accurately even in noisy environments[1]. Battery life is up to 6 hours from the earbuds alone and a total of 35 hours when used with the charging case[1].

Pricing and Availability

The Xiaomi Watch S5 46mm has a suggested market price of 24,800 yen (tax included) for the black and silver variants and 27,800 yen (tax included) for the ceramic blue and jungle green variants[1]. It comes in four colors in total. The Xiaomi Buds 6 have a suggested market price of 15,800 yen (tax included) and are available in four colors: graphite black, pearl white, titanium gray, and nebula purple[1].

Both products open for pre-order at 22:00 on Thursday, May 28, and go on sale on Thursday, June 4[1]. Sales channels include Xiaomi Store locations and the Xiaomi Service Center in Akihabara, as well as the official Xiaomi website (mi.com), the official Xiaomi Rakuten Ichiba store, Amazon, and the official Xiaomi Japan TikTok Shop[1]. In addition, customers who buy a product together with the Xiaomi 17T series between Thursday, May 28, and Tuesday, July 21, receive a 3,000-yen (tax included) discount[1].

Summary

The Xiaomi Watch S5 46mm is a high-end smartwatch with a 2500-nit OLED display, up to 21 days of battery life, and a stainless steel body. The Xiaomi Buds 6 combine a lightweight design of 4.4g per earbud with Hi-Res playback via aptX Lossless. Both go on sale on June 4, with the watch starting at 24,800 yen and the earbuds at 15,800 yen. They look like appealing options for anyone seeking long battery life and high visibility, or earbuds that balance light weight with sound quality.

出典:https://prtimes.jp/main/html/rd/p/000000239.000098799.html