The primary purpose of practicing the Sanchin kata lies in developing te-no-uchi—the internal awareness and control within the hands. While much emphasis is often placed on the tanden (lower abdomen) or hara (gut feeling), these are actually outcomes, not goals in themselves.
If one mistakenly believes that the purpose of Sanchin is to create hara awareness or to strengthen the tanden, they may end up forcefully tightening the abdominal area or applying pressure to the body’s center. This kind of focus misplaces the true aim of Sanchin. It leads to an obsession with intra-abdominal pressure and center-body control, which distracts from what Sanchin truly cultivates.
In kata, it is the final form—the shape we end with—that holds meaning. In Sanchin, the final motion known as koko (tiger’s mouth) involves extending the hands forward, fingers open, and this posture symbolizes the culmination of internal awareness developed through the kata. The purpose of Sanchin is, ultimately, to foster this internal sensation within the hand. And it is precisely through cultivating te-no-uchi that the sensation of hara naturally emerges.
This principle extends to practical training, such as in sparring (kumite), where maai (distance and timing) plays a key role. Maai can be described as a "texture" of the brain—a mental state. Consider someone you’ve just met who talks incessantly; perhaps they’re subconsciously relieving inner tension to preserve their personal maai. When we’re tense, our hands sweat or tremble. In this way, the state of the brain is reflected in the condition of the hands.
Successful sparring occurs when the shape and feeling of your hands align with the internal form developed through kata. If you become tense during sparring, your posture breaks down. Even if you consciously try to maintain good posture, if it’s only outward appearance, the inner tension remains. However, the moment your internal sensation in the hands shifts into the state cultivated through kata, the mind calms, and fear disappears. This is what it means for the hara to "settle."
In today’s world, core training is popular, and many tend to associate hara awareness with abdominal pressure or physical control. But true hara feeling is not something you create through manipulation—it is something that arises as a result of the internal hand awareness developed through kata.
So what does it mean to have energy flow through the hands? While this may sound abstract, it's something we all have experienced. For instance, when you instinctively reach out to support an elderly person who’s about to fall, your hands respond with a certain depth and sensitivity. Or when you carefully hold something precious, your hands adopt a particular quality. These moments come not from thought, but from instinct. And in those instances, it’s not the head that leads—it’s the hara.
The aim of kata training is to make this instinctual quality of the hands accessible on command, with awareness. This is why traditional martial arts speak of shisui meikyō—a mind like still water and a polished mirror. Through repetition of kata, we refine te-no-uchi, and as a result, we cultivate this calm, clear mental state.
Sanchin differs from other kata in that it does not primarily focus on techniques or responses to imagined opponents. Rather, it is about forming the internal structure of the hands. Entering a sparring exchange "through the kata" means entering through te-no-uchi—which also means entering through the hara—which in turn signifies the state of shisui meikyō within the mind.
In this sense, kata practice is a deeply practical method of training the heart, mind, and body for true presence.