The PANORAMA series

Elementary Japanese: PANORAMA & Pre-Intermediate Japanese: PANORAMA Plus 

Many elementary-level texts are designed in a way that covers the beginner learning items in two separate volumes (the first half in the first volume and the second half in the second volume). This approach forces learners to start learning intermediate materials without first having sufficient opportunities to use learned beginner items in various contexts.
In contrast, the PANORAMA series introduces all the beginner learning items in the first volume, and the second volume provides additional activities when learners perform various tasks using the skills cultivated in the first volume. This approach allows learners to spend a sufficient time to develop solid pre-intermediate proficiency efficiently and helps them begin intermediate learning seamlessly.