Polydor years is a spiritual successor to Polydor's ESSENCE OF HIRASAWA SOLO WORKS 1992 compilation (with the exception of the Water in Time and Space song "Skeleton Coast Park" and the original mix of "Bandiria Travellers", the entire ESSENCE OF HIRASAWA SOLO WORKS selection is present here), expanded with digitally remastered tracks released after that compilation.

The project was spearheaded by Osamu Takeuchi, a former Polydor employee whose first job with the company was as assistant director on Water in Time and Space (he kept his position on all subsequent Hirasawa Polydor releases, and was part of some of the impromptu chorus section that Hirasawa formed for certain songs).

Kasiko Takahasi, whose Fascination company published Hirasawa's "Music Industrial Wastes" & "Near Future Never Come" books, was brought in to supervise.

Takahasi, as well as Akiro "Kamio" Arishima (leader of The Bach Revolution, founder of AC Unit and holder of a 16-years long on-and-off creative partnership with Hirasawa), Yasuhiro Nakano (Disk Union manager that assisted Hirasawa in creating the SYUN label, later on funded the new wave shop Mecano) and Susumu Kunisaki (editor of Sound & Recording Magazine) all wrote of their experiences with Hirasawa's work under Polydor, which were made into new liner notes for the albums.

The album comes with a 32-page long color booklet, which contains a large essay by Sound & Recording Magazine editor Susumu Kunisaki, the cover is the photograph used on the inner part of the ESSENCE OF HIRASAWA SOLO WORKS tray card, with slivers of Hirasawa's first 5 main albums overlaid on it.