How does the portal in Inuyasha work?


In the Inuyasha series Kagome goes through a portal to get to the Sengoku
period of Japan. Is it ever explained how the portal works?




For what I have seen/read, it is never clearly explained how the well actually
transports people from the modern age to the Feudal Era. However, the Inuyasha
Wikia page on it has a consolidation of observations in regards to who can
pass through the well in either direction.

>   * The only human that is able to travel through the well is Kagome.
>
>   * Inuyasha can travel through without any need of the Shikon Jewel; it is
> mostly because of his connection to Kagome that allows him to move between
> the two eras of time.
>
>   * Neither Sōta nor Shippō are able to pass through the well; however,
> Sōta's voice could reach Inuyasha for unknown means while Shippō no success
> what so ever.
>
>   * Mistress Centipede was killed and sent to the present era without any
> need of the jewel; it is suggested that demon's bones can pass through the
> well. In this case, Mistress Centipede was revived because she was near the
> Shikon no Tama (which was still in Kagome's body, unbeknownst to her).
>
>   * Yura was able to send her hair to wreak havoc in the future; most likely
> because of the jewel shard she stole.
>
>   * Both Sō'unga and Saya were able to pass through without the need of the
> jewel.
>
>   * It can be presumed that only certain beings may pass through the well; a
> number of objects have the ability to as well.
>
>

Kagome is originally pulled through the well/portal into the Feudal Era by
Mistress Centipede.




For what I have seen/read, it is never clearly explained how the well actually
transports people from the modern age to the Feudal Era. However, the Inuyasha
Wikia page on it has a consolidation of observations in regards to who can
pass through the well in either direction.

>   * The only human that is able to travel through the well is Kagome.
>
>   * Inuyasha can travel through without any need of the Shikon Jewel; it is
> mostly because of his connection to Kagome that allows him to move between
> the two eras of time.
>
>   * Neither Sōta nor Shippō are able to pass through the well; however,
> Sōta's voice could reach Inuyasha for unknown means while Shippō no success
> what so ever.
>
>   * Mistress Centipede was killed and sent to the present era without any
> need of the jewel; it is suggested that demon's bones can pass through the
> well. In this case, Mistress Centipede was revived because she was near the
> Shikon no Tama (which was still in Kagome's body, unbeknownst to her).
>
>   * Yura was able to send her hair to wreak havoc in the future; most likely
> because of the jewel shard she stole.
>
>   * Both Sō'unga and Saya were able to pass through without the need of the
> jewel.
>
>   * It can be presumed that only certain beings may pass through the well; a
> number of objects have the ability to as well.
>
>

Kagome is originally pulled through the well/portal into the Feudal Era by
Mistress Centipede.

