Big pink flowers on a leafless tree - Japanese magnolia

A tree in my frontyard has flowers and I can identify it now!

The tree has large pink or purple tulip like flowers. The search keyword "early spring" helps me a lot to narrow down the candidates dramatically. This one is called "Japanese Magnolia" or Saucer Magnolia. It is called "Mokuren(モクレン)" in Japanese.

It is interesting that it has lots of flowers but no leaves. I am pretty sure that it created a shade in summer because I had other flowers below and these survived well because of its shade. I should observe when this Japanese magnolia gets leaves.

It doesn't need much water. A care page said prune it after its flowers bloom. So, I should prune it after the flowers.