I find it fascinating to see how mechanical pencil makers try out various grip schemes in different pencil lines. This is interesting, how there’s that short segment of knurling on the cap, and then a generous segment of ribbing on the plastic body. Looks like the design is well thought out for a ¥500 priced model.
Did you see the latest Platinum Pro use 241? @drifand just posted a great review of it, HERE. It also features that knurled base to the nose cone, but in this case the entire grip area is knurled metal.