The bamboo training swords used in various martial arts, particularly in kendo, are commonly called "shinai." The term "shinai" refers specifically to the bamboo sword used for training and sparring purposes.

A shinai is constructed using several bamboo slats held together by leather or cord. The bamboo slats are carefully selected and arranged to create a flexible yet resilient sword that allows for safe and controlled training. The leather or cord binding at the handle provides a secure grip for the practitioner.

Shinai are designed to simulate the shape and weight distribution of a traditional sword, such as a katana, while minimizing the risk of injury during practice. They are an essential training tool in kendo and are also used in other martial arts to develop striking techniques, footwork, and discipline.