【超軽量13g Earaku オープンイヤーイヤホン】空気伝導 耳を塞がないイヤホン Bluetooth 周りの音が聞こえる Bluetooth 5.3 AAC ENC通話ノイズキャンセリング 耳掛け式 ワイヤレスイヤホン ヘッドホン 快適なフィット感 マイク内蔵 ながら聴き 自動ペアリング Type-C急速充電 15時間連続再生 ハンズフリー通話 マルチポイント接続（ブラック）

## Earaku Open-Ear Earphones Review: Ultra-Lightweight Air Conduction at a Budget Price The Earaku open-ear earphones represent an interesting entry in the growing market of ambient-aware audio devices. Priced at ¥2,999 on Amazon Japan, these air conduction earphones promise an ultra-lightweight listening experience without sacrificing functionality. Here's a detailed look at what they offer. ### Featherlight at Just 13 Grams The standout feature of the Earaku earphones is their remarkably low weight of just 13 grams. This puts them in the ultra-lightweight category, and the ear-hook design combined with soft materials ensures a comfortable fit that minimizes ear fatigue during extended listening sessions. For eyeglass wearers, the design avoids interference with glasses frames—a practical consideration that many competitors overlook. ### Air Conduction: Open-Ear Freedom Unlike traditional in-ear earphones that create a sealed environment in your ear canal, the Earaku uses air conduction technology to deliver sound while keeping your ears completely open. This means you can hear ambient sounds—traffic, conversations, announcements—while enjoying your music or podcasts. Compared to bone conduction alternatives, air conduction eliminates the buzzing vibration sensation and pressure that some users find uncomfortable. ### Impressive Battery Life and Modern Connectivity Powered by Bluetooth 5.3 with AAC and SBC codec support, the Earaku earphones offer wide compatibility with both iPhone and Android devices. The connection range extends up to 10 meters. Battery performance is noteworthy: up to 15 hours of playback at 30% volume, 13 hours at 50%, and 10 hours even at full volume. Charging is handled via USB Type-C with a full charge completing in approximately 1.5 hours. The multipoint connection feature allows simultaneous pairing with two smartphones, making it easy to switch between work and personal devices without manual re-pairing. ### Call Quality and Sound Leakage The built-in ENC (Environmental Noise Cancellation) microphone technology helps suppress background noise during phone calls, aiming to deliver clear voice transmission even in noisy or windy environments. As for sound leakage—an inherent consideration with open-ear designs—the Earaku incorporates leakage suppression technology. However, the manufacturer transparently notes that some sound leakage occurs at volumes above 80%, so users should be mindful of their volume settings in quiet public spaces. ### Simple Controls and Easy Setup Physical button controls allow for music playback management, track switching, and call answering with one-handed operation. Auto-pairing functionality makes initial setup straightforward, which is particularly helpful for users who aren't tech-savvy. ### Package Contents The package includes the wireless earphone unit, a USB Type-C charging cable, and a Japanese instruction manual. ### Final Verdict At ¥2,999, the Earaku open-ear earphones deliver a compelling package for anyone seeking a lightweight, comfortable "while listening" solution. The combination of 13g ultra-light design, up to 15 hours of battery life, Bluetooth 5.3, multipoint connectivity, and ENC microphone technology offers excellent value. While sound quality expectations should be tempered for this price range and open-ear design, these earphones excel in their intended use case: staying aware of your surroundings while enjoying audio content during commutes, household chores, exercise, or childcare.