Basically, the focus is on the third eye, the Ajna chakra. However, after the Sahasrara chakra has opened to a certain extent, it seems better to focus on the Sahasrara at the crown of the head.

There are also schools of thought that focus on the heart, the Anahata chakra, and some schools teach that people who find it easier should do so. However, in my surroundings, almost everyone focuses on the area between the eyebrows, and I haven't seen anyone who focuses on the Anahata.

In my case, the basic focus is on the area between the eyebrows, but recently, it's been on the Sahasrara.

Previously, when I experienced something like divine consciousness in the Anahata chakra, I often focused my awareness on the Anahata. However, that was for a relatively short period, perhaps around six months. After the divine consciousness, which seemed to emerge from the Anahata and connect with my back, spread throughout my body, I returned to focusing on the area between the eyebrows during meditation.

Recently, when I meditate, or even when I'm not sitting in meditation, I try to calm my awareness and consciously slow down my breathing, using my breath to quiet my mind. This helps my aura to rise to the Sahasrara, and the Sahasrara becomes dominant. This is generally easier to do during meditation, but I think it can be done in everyday life if the environment is not too noisy.

Of course, the extent to which this can be achieved varies, and proper opening requires sitting meditation. However, it is possible to stabilize the state to some extent even in everyday life.

When the Sahasrara becomes dominant, energy becomes easier to enter from the heavens or the sun, and the upper and lower energy channels along the spine (the Sushumna in yoga) become more activated.

About a year or two ago, it took an hour or two of meditation for my aura to reach the Sahasrara. Before that, it was rare or almost nonexistent for my aura to reach the Sahasrara and enter a state of stillness. However, recently, my aura gathers around the Sahasrara in just 5 or 10 seconds, or at most 10 minutes, and becomes dominant, entering a state of stillness. The energy channel that connects to the heavens above becomes thicker and more activated.

Initially, the Sahasrara was only slightly connected to the heavens, like a crack. But gradually, it began to open, becoming the size of a finger. Recently, it seems to have opened even further, and a considerable portion of my arm or the crown of my head has opened to a significant extent.

When the Sahasrara chakra opens properly, I feel a sensation as if even the bones in my head are making a "tick-tick" sound and expanding.

Sensory-wise, a shining, pyramid-like shape of light appears at the top of my head, where the Sahasrara chakra is located. Above that, there is a path that extends upwards, somewhat transparent. Along that path, I often see many square boxes or objects that resemble Lego blocks, but I don't know what they are. Nevertheless, it connects to the heavens, and because the energy routes are connected (although it seems like a small amount at the beginning), the energy from the heavens seems to be coming down to me (the phrase "coming down" is not entirely wrong, but rather, it's more like a connection), and I feel my body being filled with energy.