noun
A person who physically bears or carries something, especially in an organized event or role. Also usable for someone who carries on something in a broad sense, but the more responsibility-focused use is treated separately.
祭りでは神輿の担い手が足りない。
At the festival, there are not enough people to carry the portable shrine.
noun
person in charge; person bearing responsibility; supporting actor
Common in news, policy, education, and community contexts for the people or groups expected to sustain, lead, or take responsibility for an activity, field, tradition, or service.
地域医療の担い手を育てる必要がある。
It is necessary to train people who will support local medical care.
若者は次世代の担い手として期待されている。
Young people are expected to be the leaders of the next generation.