弱者 (jakusha) means “disadvantaged person”

More examples

社会全体で弱者を支える仕組みが必要です。sha kai zen tai de jaku sha o sasa e ru shi ku mi ga hitsu yō de su

Society as a whole needs a system to support disadvantaged people.

Centers on a person's lack of power or support in a given situation, rather than on a fixed personal trait.

弱い者yowaimono: A person who has less strength, ability, or influence than others.

社会的に不利な立場に置かれている人。sha kai teki ni fu ri na tachi ba ni o ka re te i ru hito

Combines 弱 (jaku, "weak") and 者 (sha, "person"); together, 弱者 (jakusha) denotes a person in a weak or disadvantaged position.

In English, the weak can sound literary or patronizing, while disadvantaged people and vulnerable people are more specific in public discussions.