Aiki (martial arts principle)

Etymology

The term Aiki is formed from two kanji: ai (合), meaning joining, and ki (気), meaning spirit. The kanji for ai consists of the radicals "join", "one", and "mouth", symbolizing things coming together or merging. Aiki should not be confused with wa, which refers to harmony. The kanji for ki represents a pot filled with steaming rice with a lid, symbolizing energy within the body.

Thus, aiki conveys the idea of fitting, joining, or combining energy. However, absolute meanings of words derived from other cultures and expressed in different languages require caution, especially when the words originate from kanji that represent ideas rather than literal translations. Historical usage can influence meanings and be passed down, leading to divergence between arts or schools. The principle was traditionally transmitted orally as a closely guarded secret, and modern descriptions vary from physical to vague or spiritual.

Martial arts

Aiki is the core principle behind Aikido and its predecessor, Daito-ryu aiki-jujutsu, and gives these arts their name. It also plays a key role in Kito-ryu, Judo, Yamabujin Goshin jutsu, and several styles of Kenjutsu and Japanese Jujutsu. Techniques using aiki are delicate and require little physical strength, which is why these arts are considered soft, internal martial arts.

Concept

Aiki is a complex concept described through three aspects in a martial situation. First, it involves blending rather than clashing, often referred to as awase within aikido. This emphasizes joining with the opponent's rhythm and intent to find optimal position and timing, requiring practitioners to yield to incoming forces while distinguishing blending from giving way and instead taking the line of attack to control it. Aiki is closely related to the principle of ju, though ju focuses more on active physical manipulation.

Second, the practitioner leads the assailant into precarious positions, with influence growing as the assailant's balance deteriorates. Body movements (tai sabaki) may be large or subtle, using weight shifting and physical pressure to lead, keep static, or unbalance (kuzushi) the opponent. Deceptive movements can negate or create a defense response that further endangers the assailant, involving a strong degree of intent, will, or psychology. Third, the concept includes the use of internal strength, or ki energy.

Thoughts on the concept

Aiki is considered an ancient practice, often kept within a particular individual or two from a family or school lineage. Culturally, due to necessities of the time, aiki knowledge was usually a well-guarded secret and rarely disclosed. The oldest book to discuss aiki was the 1899 Budo Hiketsu-Aiki no Jutsu, and the 1913 Jujutsu Kyoju-sho Ryu no Maki stated that the term has been used since ancient times and is not unique to Daito-ryu, with ki in aiki being go no sen, meaning to respond to an attack.