Aikido Weapons

Weapons training in aikido traditionally includes the short staff (jō), wooden sword (bokken), and knife (tantō). Today, some schools also incorporate firearm-disarming techniques. Both weapon-taking and weapon-retention are sometimes taught, to integrate armed and unarmed aspects, although some schools of aikido do not train with weapons at all. Others, such as the Iwama style of Morihiro Saito, usually spend substantial time with bokken and jō, practised under the names aiki-ken, and aiki-jō, respectively. The founder developed much of empty handed aikido from traditional sword and spear movements, so the practice of these movements is generally for the purpose of giving insight into the origin of techniques and movements, as well as vital practice of these basic building blocks.

short staff (jō)

wooden sword (bokken)

knife (tantō)

Article source: http://en.wikipedia.org/wiki/Aikido