Influential; prominent — having power, importance, or strong influence (often about people or organizations).
彼は党内で有力な支持者だ。
He is an influential supporter within the party.
その新聞は地元で有力なメディアだ。
That newspaper is a leading media outlet locally.
有力者の推薦が決め手になった。
A recommendation from a powerful figure was decisive.
Strong; likely; convincing; promising — indicating something substantial, persuasive, or likely to succeed.
有力な証拠が見つかった。
Strong evidence was found.
彼は今年の優勝候補として有力視されている。
He is considered a strong contender to win this year.
新商品の売上は有力な手応えがある。
The new product is showing promising sales response.