The obvious hook is…here is LLLL, with the latest number in his “Chains” series, “Hollow.” Yet the deeper point of interest? After a stretch featuring a wide array of vocalists from Japan and abroad, the project returns to the voice that graced the earliest LLLL releases. It’s a nice, familiar feeling, but critically not a retreat into nostalgia — LLLL has long used a variety of vocalists to occupy his shadowy pop songs, and over the past two years the group has never been defined by a single one. Yet that said…this is the voice that introduced LLLL to the Japanese music community, and hearing her sing over sparse electronics and moments of sparkling escape feels comforting. Listen above.