"You fool! What do you mean by such a question? We use kicking techniques or anything else. I even used artillery. Martial arts, guns and artillery are all aikido. What do you think aikido is? Do you think it involves only the twisting of hands? It is a means of war… an act of war! aikido is a fight with real swords. We use the word ‘aiki' because through it we can feel the mind of the enemy who comes to attack and are thus able to respond immediately. Look at Sumo. After the command is given ("Miatte! Miatte!), they stand up and go at each other in a flash. That's the same as aiki. When a person suddenly faces his enemy in an mental state free from all ideas and thoughts and is instantly able to deal with him, we call that aiki. In the old days it was called ‘aiki no jutsu'. Therefore, artillery or anything else becomes aiki."
-- Minoru Mochizuki
Interesting that you chose to use this quote, as I have always found it particularly inconvenient for those proposing that aiki = IP. And it is a rather clear statement.
I find that it points to aiki as being a principle of relating or interacting, in which one perceives and then responds to the other's intent and then commitment to act, which by necessity precede the act itself. Doing so allows one to still follow the opponent, so as to be appropriate, and yet does not require waiting for the physical act before responding, so as to avoid being late. It further suggests a neutral state from which you can perceive what is actually happening, not your ideas about what is happening.
The "IP/IT/IS" paradigm as discussed here on AikiWeb would seem to have very little to do with the use of or defending against guns, and even less to do with artillery.
Of course, it is possible that Mochizuki (and/or the translator) was unable to understand do to a lack of background information. But then how would you reconcile that with:
Christopher Li wrote:
Ueshiba did think enough of Mochizuki that he wanted to adopt him into the family and make him his successor. In 1951 he taught Aikido in Europe with Ueshiba's blessing. His 10th dan was specifically approved by Kisshomaru Ueshiba in 1979.