The Japan national under-23 football team (Japanese: U-23サッカー日本代表) is a national association football youth team of Japan and is controlled by the Japan Football Association. The team won the gold medal at the 2010 Asian Games and were champions in the 2016 AFC U-23 Championship. Since 1992, it was decided that teams targeting athletes under the age of 23 will participate in the Olympics (additional provisions for overage limits have been added since 1996). Therefore, the name changes to Japan national under-22 football team the year before the Olympics and Japan national under-21 football team two years prior. The exception to this was the 2020 Tokyo Olympics, which was postponed one year, so in 2021, the team was called the Japan national under-24 football team.

Jaapan U23 on Jaapani U23 meeste jalgpallikoondis, mida juhib Jaapani jalgpalliliit. Nad on Aasia Jalgpallikonföderatsiooni (AFC) liikmed.

Jaapan U23 on võitnud Aasia U23 meistrivõistlused neli korda, aastatel 2000, 2004, 2006 ja 2016. Nad on esindanud Aasiat suveolümpiamängudel üheksal korral, sealhulgas kahel korral, kui nad on võitnud pronksmedali (1968 ja 1996).

Jaapan U23 on tuntud oma kiire ja tehnilise mängustiili poolest. Meeskonnas on mitu andekat mängijat, kes mängivad Euroopa tippklubides.

Praegune Jaapan U23 peatreener on Hajime Moriyasu.