English to Japanese Art/Literary Environment & Ecology Translated Acknowledgement of Country

Sentence where the term occurs is like this "In the spirit of reconciliation [ORGANISATION] acknowledges the Traditional Custodians of country throughout Australia and their connections to land, sea and community. We pay our respect to their elders past and present and extend that respect to all Aboriginal and Torres Strait Islander peoples today."

The target audience is mainly for the Japanese community in Australia.

To celebrate Reconciliation Week, a LSP has updated our Acknowledgement of Country translation list from 20 to 35 of Victoria’s most common languages to help all Australians embrace the rich history of this country.
https://insights.languageloop.com.au/acknowledgement-of-coun...

I didn't translate it, but it is translated as below on their website.
和解の精神の下、[ORGANISATION]は、オーストラリア全土の土地の伝統的な管理人と、彼らの土地や
海、コミュニティとの結びつきを認めます。我々は、過去と現在における彼らの長老に敬意を払い、
今日のすべてのアボリジニとトレス海峡諸島の人々にもまた敬意を払います

I am not sure about the word 管理人, and I would like to hear what you think about this translation. Thanks in advance.