A dying "Thuja occidentalis Rheingold" almost dried out

[prongs]

Hello everyone
My friend just brought me this cypress which is not a common bonsai by the way and asked me for help. The exact name is Thuja occidentalis Rheingold.
I touched the leafs and I realized that almost all the leafs are dried and death, and many branches also were brittle and death,


I've cut all the death leafs and branches and here is what left of this beautiful tree that doesn't seem death and still flexible

My guess is it's been underwatered a lot.
I wanted to know if there is any hope for this and what should I do and don't.
I watered it well and it's currently outside in shade.
Any suggestions and helps are highly appreciated.

 

[Wires_Guy_wires]

It's not a thuja.
Probably a curpessus macrocarpa. They require different care than thuja.

 

[sorce]

The dark soil and curved in lip are poor for aeration and safe watering.

I'd put it in a basket.

Sorce

 

[sorce]

Basket being a proper root pruning colander device.

Sorce