Japan’s four backup players will join the men’s football squad after a change to Paris Olympics regulations enabled 18 players to be selected from a total of 22 on the day of a match, the Japan Football Association said Thursday. Kashiwa Reysol goalkeeper Masato Sasaki, Jubilo Iwata defender Kaito Suzuki, Tokyo Verdy midfielder Fuki Yamada and Yokohama F Marinos midfielder Asahi Uenaka will team up with the U-23 Samurai Blue in France. Uenaka replaces NEC Nijmegen midfielder Kodai Sano, who was on the original backup list but has now been withdrawn following a discussion between the JFA and th…