Kobudo and Kobujutsu
Whilst the term Ko Bu jutsu refers to Old Martial Arts and the weaponry of these systems, the term Ko Bu Do refers to Old Martial Ways and is generally associated with Okinawan Weaponry of a later period, this term is used thus to describe common Karate weaponry. 
Hakuda Ryu Kempo Jutsu also has weapons associated with its practise quite early on though it is not formally introduced until 3rd Kyu Brown Belt. This is because the weapons used in all martial arts have a relationship to their empty handed techniques, for example many techniques in Aikido and some styles of Ju Jutsu are based on movements that were originally done with a sword.
The true martial traditions of warriors such as the Samurai primarily relied upon the use of weapons such as the sword and the spear (Yari) empty handed techniques were secondary to the weapons techniques. However there are also civilian fighting traditions, these are traditions which consisted of a method of defence against other civilians who were perceived as a threat to society and individuals in both war or peace time. I.e. Drunkards, Bandits, Robbers and Pirates. Occassionally these civilian fighting methods would be used against armed warriors though rarely in battlefield situations. To find out more about the weapons used in our Ju Jutsu see: Japanese Weapons
The Okinawan civilian fighting traditions which we know today as Okinawan Karate developed weapons systems which today we refer to as Kobudo and this involved the adaptation of various hand tools into weapons which may have been partly due to the confiscation of swords on the Island by one of the early Okinawan Kings and later by the Satsuma Samuari that occupied the island in 1609 (Bishop 1996:101). This does not mean that weapons techniques with sword or spear were completely disregarded, their possession and practise depended upon their families martial inheritance and an individuals social status in Okinawan Society. To find out more about the wepons used in our Kempo see Okinawan Weapons