There are a few different names for this weapon, which is of varying lengths. A Kubo is generally a small, hand-held stick that has become popular the last few decades as a self-defense tool.
The yawara is a Japanese weapon used in various martial arts. The Yawara originated from the use of Kongou, a Buddhist symbolic object, by various monks during Feudal Japan. The Yawara takes the form of one or two small, thick sticks which stick out about an inch from each side of the hand. They are usually used in pairs to initiate throws, bone breaks, and pressure point strikes.