The name Ki Ken Tai in Chinese / Japanese...

气剑体一致 often gets translated as “Mind Sword Body,” or “Spirit, Sword, and Body as One.” But I think these translations don't tell you enough about what this is really saying.

In this context, 気, which is the modern Japanese version of 氣, means spiritual and unseen energy or “life energy.” In some cases, 気 can be translated as spirit, feeling, or nature. If defined as the mind, it's more about the invisible or intangible parts of one's mind (or soul).

剣 is the Japanese version of 劍 meaning sword.

体 is the modern Japanese version of 體 meaning body.

The Kanji 一 means one, and in this case, suggests “all in one.” The Kanji 到 means to send, deliver, or convey. But together, 一到 suggests all these things in agreement, union cooperation, or in concert.

Note: Arguments exist as to whether this should be romanized as Kikentaiitchi, Kikentaiicchi, or kikentaiichi. Technically, if you drop the last character, you get 気剣体一 and kikentaiichi (ki ken tai ichi), which is also a valid phrase.

気剣体一致 is the title Ki Ken-Tai Icchi.

気 = energy, 剣 = sword, 体 = body, 一致 = synchronization/unity. So, “energy, sword, and body in unison” would be one way to translate this. Sometimes written with the possessive article, の, making it 気剣体の一致 or “Ki Ken-Tai no Icchi.” Let me know in the special instructions if you want that の character added by the calligrapher.