ぜんとようよう
with a rosy future; offering promising prospects
Also written 前途洋洋
No-adjective, Taru adjective, Adverb (-to)
この若わかさで国際こくさい大会たいかいで優勝ゆうしょうするなんて、まさに前途洋洋ぜんとようようですね。
His victory at this age in an international competition is a good indication of a bright future.