age fifty; one's fifties
Refers to the age of fifty or the decade of one's fifties. Often used in literary or formal contexts.
彼は五十路を迎えた。
He reached the age of fifty.
五十路の坂を
Once you pass the hill of your fifties, you feel your physical strength decline.
Means 'one's fifties' in a more modern, everyday sense, while 五十路 is more literary.
Standard kanji spelling for the age fifty or one's fifties.
Alternate spelling; less common and may be confused with the numeral 五十 (ごじゅう).
From 五十 (いそ, 'fifty') + 路 (じ, 'road' or 'path'), literally 'the road of fifty', a poetic way to refer to the age of fifty.