From AikiWiki - AikiWeb Aikido Information
[edit] Suburito: 素振り刀
A heavy (and sometimes longer) bokken/bokuto that is used to develop greater control and form for one's weapons training. Students often use the suburito to develop their forearm, wrist, arm, and other muscles.
Page on suburito usage exercises: http://ejmas.com/pt/ptart_taylor_1200.htm
