J-pop favorites WEST. kicks off 2026 with their first release of the year, “Aisyu,” a track that leans into deep emotion while keeping their signature Kansai energy intact 🇯🇵✨. Now available worldwide, the song opens a new chapter for both longtime fans in Japan and international listeners discovering the group’s evolving sound.
🎥 Watch WEST. – 愛執[Official Music Video]
![WEST. - 愛執[Official Music Video]](https://i.ytimg.com/vi/FXmL_2JJdms/hqdefault.jpg)
Driven by a hard-hitting beat and emotionally charged lyrics, “Aisyu” (pronounced ai-shu, meaning “affection”) explores the intensity of love that sits somewhere between desire and obsession 💔🔥. The song captures the push-and-pull of complicated relationships, blending vulnerability with confidence in a way that feels dramatic yet polished.
Adding to its impact, “Aisyu” serves as the theme song for the romance-suspense drama All Because of You (Zenbu, Anata no tame dakara), currently airing on TV Asahi 📺. The series stars WEST. member Ryusei Fujii, giving the track extra emotional weight and narrative depth. The song’s mysterious tone pairs seamlessly with the drama’s tension, making it a natural fit for late-night viewing and repeat listens 🌙🎧.
Sonically, “Aisyu” introduces a slightly darker and more restrained mood compared to WEST.’s typically colorful and upbeat catalog. That balance—between flirtation, obsession, and polished pop—marks this release as a meaningful step forward, especially following the group’s move to digital platforms and global streaming access last year 🌍🎶.
Stream WEST.’s “Aisyu” Single On Apple Music

Debuting in 2014, WEST. is a seven-member group under STARTO ENTERTAINMENT, known for their charisma, humor, and strong group chemistry. With over a decade of experience, they continue to evolve while staying true to the personality fans love 💫.
Whether you’re a longtime J-pop supporter or a new listener tuning in from overseas, “Aisyu” offers an emotional entry point into WEST.’s world—intense, dramatic, and undeniably catchy 🎵💥.
What was YOUR first reaction to Aisyu? 🗣️ Did the song leave you stunned, or are you looping it on repeat? Join the conversation in the comments below, and let’s keep the P.E.A.C.E. Vibe flowing! ✌️✨
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