There are various other aikido practitioners and independent factions that study the possibilities of aikido as an art of self-defense, and since there are techniques and movements in mixed martial arts and karate that are common to those of aikido, some consider it useful as an art of self-defense.
これ以外にも独自に護身術としての合気道の可能性を研究する合気道家や独立会派も複数有り、総合格闘技や空手の中に合気道と共通の技や捌きが見られることから、護身術としての有用性を見出す意見もある。