Choosing a nage rod
Start at 4.05 m, because the discipline did. That single length dominates the catalogue, with 4.25 m and 4.50 m as the steps beyond it and shorter blanks from about 2.5 m for confined ground. Length is leverage here, and leverage is distance. Go longer only if you can already load what you have.
Match the rod to the lead you actually throw. The sinker rating is the specification, given in 号 at 3.75 g each, and 23号 to 35号 covers most of the fishing. Under-loading a stiff nage blank wastes it, and over-loading one is how rods break on the cast.
Telescopic or jointed is a real fork, and the same rod is often sold both ways. Shimano lists Surf Lander as a Telescopic and as a Put-In (並継, jointed) version. Telescopic collapses for the walk to the beach; the jointed build gives a cleaner continuous taper. Neither is the enthusiast's choice by default.
Ryojiku is for casters who have already put in the hours. A two-axis conventional reel outcasts a fixed spool once the thumb is trained, and overruns badly before that. The rods built for it are a small, deliberate corner of the range.
Do not go looking for a power rating. Nage rods almost never publish one, and most publish no line rating either. The sinker range and the length are what you choose on, which is unusual in this catalogue and entirely normal here.