newb question: Hugelkultur in a 180mm/7in rainfall month

This newbie (me) recently talked about hugelkultur to two organic, semi natural farmers in two different occasions.

Both times, the response was, "---so that removes the excess water?"

I get the impression that farming in my area (I am north of tokyo) is more about removing excess water than retaining water.

The most rain we get per month is september with ~180mm or 7in. Least rain is feburary with 60mm or 2.4in. Are we past some rain threshold where hugelkultur stops being useful? Or will it still be magnificent?

Yasmi Watanabe wrote:I get the impression that farming in my area (I am north of tokyo) is more about removing excess water than retaining water.

.... Are we past some rain threshold where hugelkultur stops being useful? Or will it still be magnificent?

I am sorry that your post has not gotten any replies.

Here is some information that you or others might find interesting;

https://richsoil.com/hugelkultur/

https://permies.com/t/7292/replacing-irrigation-permaculture

https://permies.com/t/hugelkultur