Just signed for a side in the Portuguese second division. He's about to turn 56, and played in the first international match I ever went to - Japan v Sweden at the City Ground, in 1995! https://www.bbc.com/sport/football/64488275
Coincidentally Shunsuke Nakamura, who used to play for Celtic, only recently stopped playing to take up a coaching role at Yokohama, at the age of 44.