I was going to say - as the comment says - this is the Grand Tree from Laputa. Amazing effort.

EDIT - this actually IS the original concept painting from the Laputa art book (I thought it was very familiar, or a good copy)

I think the uploader was meaning to post this

https://www.pixiv.net/en/artworks/90180383

as the above pixiv link is dead, and the name is very similar (one syllable difference)

Unless this is just a tracing someone did...