Jah Diving Club is a PADI 5-Star Dive Center based in Tsukuba, Ibaraki Prefecture, Japan, describing itself as having been open for around 38 years at the time of writing. The shop markets itself as accessible even to non-swimmers, keeping a maximum instructor-to-student ratio of 1:4 and reporting roughly 1,900 people certified through its courses, with participants ranging from their teens to their eighties. It runs pool sessions locally and takes students to the sea (day-trip or overnight tours, commonly to the Izu area) for open-water training and fun-diving tours, and offers home study materials (manual/DVD) ahead of in-person sessions. The shop also sells and services dive gear and offers equipment storage for members.