The "Jodoron" is a commentary on the "Muryoju-kyo Bussetu Muryoju-kyo" (the Sutra on the Buddha of immeasurable life), which means that this book is an additional commentary on it.
『浄土論』は『無量寿経仏説無量寿経』に対する註釈であり、本書は再註釈ということになる。