Half a year or a year ago, it sometimes took an hour or two, but recently, it's been quite fast, and about once in two times, the aura rises to the Sahasrara chakra in about 5 seconds. Even without sitting meditation, if you concentrate a little or hold your breath (Kundalini yoga), the aura can quickly rise to the Sahasrara chakra, but it still seems to be more stable with sitting meditation.

In terms of rising to the Sahasrara chakra, the aura has risen to the Sahasrara chakra even without sitting, but considering the concentration or the density of the aura, it seems better to do sitting meditation. When you do sitting meditation, the aura not only gathers in the Sahasrara chakra, but also reaches all parts of the body sufficiently, and in places where the aura was not yet fully reaching, the aura gradually flows through those areas, and those areas seem to become activated. For example, I used to have a weak right arm, which made it easier for other entities to enter, but when I do sitting meditation, especially when I focus on my right hand, the aura reaches every corner of my right hand. Previously, the aura around my right shoulder was weak, but now it's relatively okay, and while I'm meditating and focusing on my right hand, the aura even reaches the area around my slightly weak right elbow and fingertips. In addition, for example, if there was a slightly blocked area on the right side of my chest compared to the left, such blocked areas become easier to pass through, and the balance between the left and right sides becomes more balanced.

In this way, sitting meditation has effects not only on the Sahasrara chakra, but the basic principle is concentration on the Sahasrara chakra, and by the aura gathering in the Sahasrara chakra, the overall aura of the body becomes better and balanced.

This is sometimes described in yoga as the aura spreading from the Sahasrara chakra like a shower or an umbrella, but the feeling is not like a membrane that is like an umbrella from the Sahasrara chakra, but rather, if the aura is activated to the point where it reaches the Sahasrara chakra, it will eventually become a spherical aura.

The Sahasrara chakra is recently considered one of the chakras, but some schools do not consider it a chakra, which is a matter of interpretation, but indeed, the Sahasrara chakra is more like a point where multiple chakras are integrated as a unified chakra, rather than a single chakra. When viewed as such a role, it is indeed a chakra, but from the perspective of a unified chakra that includes Ajna and Anahata, the Sahasrara chakra is either a part of a chakra or not a chakra, and it depends on how you look at it. If the Sahasrara chakra is the turning point from an individual chakra to a unified chakra, then the Sahasrara chakra is neither a chakra nor not a chakra (a part of a unified chakra), and there is a view that it is in between.

Although there are various schools of thought, I personally feel that it is clearer to consider it a chakra, and since it is the same feeling even if it is considered another chakra, I don't feel any discomfort in considering it a chakra.