SOUND GLASS open-ear audio glasses start at ¥8,778

SOUND GLASS went on sale in Japan on September 10, 2026, with three open-ear audio eyewear ranges. The ¥8,778 ST models provide the entry point, while the ¥20,350 EW and SG ranges cover clear-lens eyewear and outdoor-focused sunglasses.

Audio hardware built into the temples

Every range places speakers and an ENC-equipped MEMS microphone inside the temples and connects to smartphones over Bluetooth 6.0. The maker lists call noise cancellation across all three ranges, but ENC works on microphone pickup rather than providing headphone-style active noise cancellation.

Bluetooth 6.0 by itself does not guarantee lower latency, stronger stability or better sound. The open-ear structure leaves the ear canal unobstructed, but it also cannot guarantee awareness or safe use outdoors.

How the three ranges differ

• ST01–ST04: ¥8,778, up to eight hours of music playback, IPX4 and no sound-leak reduction feature. Seven variants are listed, and every ST model except ST01 supports prescription lens replacement.
• EW01–EW02: ¥20,350, with LDAC, IP54, sound-leak reduction and prescription lens replacement. Range materials list eight to nine hours of music playback, while the current official EW reservation page lists up to eight hours of music and four hours of calls.
• SG01–SG02: ¥20,350, with 7.5 hours of music playback, IPX6, polarized or photochromic lenses and a reverse-phase sound-leak reduction feature. The range is positioned for active outdoor use.

Fit and privacy still need a real-world check

The available details come from maker materials and official store listings, without independent testing of sound, calls, latency, leakage, comfort, fit or battery life. Trying the frame and lens fit in person is worthwhile when possible.

Anyone who places privacy or audio quality first may prefer to wait for independent tests. Listed sound-leak controls describe included features, not proof of how well they work in everyday surroundings.