Half a year or a year ago, it sometimes took 1 or 2 hours, 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 (what is called Kumbhaka in yoga), the aura can quickly rise to the Sahasrara chakra, but it still seems that it is 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 that sitting meditation is better. When you do sitting meditation, not only does the aura gather in the Sahasrara chakra, but it also reaches all parts of the body sufficiently, and in places where the aura was not yet fully reaching, the aura gradually flows, and those areas become activated. For example, I have been weak in my right arm since I was young, and it has been easy for other entities to enter through it. However, 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 in my right shoulder was weak, but now it is relatively okay. While focusing on my right hand during meditation, the aura even reaches the area around my slightly weak right elbow and fingertips. In addition, for example, if there was a slightly congested area in the right chest compared to the left, such congested areas become easier to pass through, and the balance between the left and right 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 condition of the aura in the body becomes better, and balance is achieved.

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

The Sahasrara chakra is recently considered one of the chakras, but in some schools, it is not considered a chakra, which is a difference in interpretation. Indeed, the Sahasrara chakra is more like a point where the aura becomes unified and multiple chakras start moving as an integrated chakra. When viewed as such a role, it is certainly a chakra, but from the perspective of the aura becoming unified and the integrated chakra moving as a large aura and a large chakra including the Ajna and Anahata chakras, the Sahasrara chakra can be considered either part of a chakra or not a chakra. It depends on how you look at it. If the Sahasrara chakra is the turning point from an individual chakra to an integrated chakra, then the Sahasrara chakra is ambiguous, and it can be considered either a chakra or not (a part of an integrated chakra).

Although there are various interpretations, I personally think it's cleaner to consider it as "chakra," and even if we consider other things as "chakra," they feel similar, so I don't think it's strange to consider it as "chakra."