Japan fielded a full squad of men's team recurve by virtue of their bronze-medal victory at the 2023 World Championships in Berlin, Germany, obtaining one of three spots available at that competition.

Japanese track and field athletes achieved the entry standards for Paris 2024, either by passing the direct qualifying mark (or time for track and road races) or by world ranking, in the following events (a maximum of 3 athletes each):[3][4] Japan entered twelve badminton players into the Olympic tournament based on the BWF Race to Paris Rankings.

[15] Japanese riders obtained a full spots for men's track events and women's sprint, keirin, team pursuit, madison, and omnium; following the release of the final UCI Olympic rankings.

Japanese riders received a single quota spot in the men's BMX freestyle for Paris 2024, finishing among the top two at the 2022 UCI Urban Cycling World Championships in Abu Dhabi, United Arab Emirates.

[16][17] Japanese riders secured a single quota place in the women's BMX race for Paris 2024 by topping the field of nations vying for qualification at the 2023 Asian Championships in Tagaytay, Philippines.

[18][19] Japanese divers secured five quota places for Paris 2024 by advancing to the top twelve final each of the men's individual platform, women's individual springboard and platform, respectively at the 2023 World Aquatics Championships in Fukuoka, and through 2024 World Aquatics Championships in Doha, Qatar and unused quota reallocation.

Japanese jumping squad entered the competition by securing the last of two available team spots at the International Equestrian Federation (FEI)-designated Olympic qualifier for Group G in Valkenswaard, Netherlands.

Key: Japan men's football team qualified for the Olympics by advancing to the finals of the 2024 AFC U-23 Asian Cup in Doha, Qatar.

[24] On the following day, Kaito Suzuki replaced the injured Riku Handa, while Takashi Uchino was called-up as an alternate player.

Five male gymnasts qualified for the games after scoring a runner-up finish in the team all-around at the 2022 World Championships in Liverpool, Great Britain.

[39] In mid-July, nineteen-year-old Shoko Miyata was removed from the Japanese women's team after smoking and drinking alcohol, which are prohibited in Japan for those under 20.

[46] Head coach: Antonio Carlos Ortega[47] Japan judoka have qualified all fourteen quota places (seven in each gender) for the Games.

Taishu Sato and Misaki Uchida secured their spots in their respective gender events by virtue of top five eligible nation's through the 2022 Asian Games in Hangzhou, China.

[49] Japanese rowers qualified boats in the following classes through the 2023 World Rowing Championships in Belgrade, Serbia; and 2024 Asian & Oceania Qualification Regatta in Chungju, South Korea.

Tomoa Narasaki and Ai Mori qualified directly for the men's and women's boulder and lead combined event, by winning the bronze medal and securing one of the three berths available at the 2023 IFSC World Championships in Bern, Switzerland.

Tokyo 2020 silver medalist Kanoa Igarashi and rookie Shino Matsuda topped the list of eligible surfers from Asia to secure the lone available berth in their respective shortboard races at the 2023 ISA World Surfing Games in Surf City, El Salvador,[62][63] while a second male Japanese surfer will soon be named to join the Japanese roster for Paris 2024, following his nation's successful triumph in the men's team event at the 2022 ISA World Surfing Games in Huntington Beach, California.

Furthermore, Japanese swimmers must secure a direct slot on the Paris 2024 roster if they win a gold medal in any individual pool event at the 2023 World Aquatics Championships, scheduled for July 22 to 30, in Fukuoka.

Japan entered three triathletes (two men's and one women) in the triathlon events for Paris, following the release of final individual Olympics qualification ranking.

[76] Head coach: Masayoshi Manabe[77] Japan men's national water polo team qualified for the Olympics after winning the gold medal at the 2022 Asian Games in Hangzhou, China.

Ten of them qualified for the games by virtue of top five results through the 2023 World Championships in Belgrade, Serbia;[81][82] meanwhile, the other three wrestlers qualified for the games, by virtue of their victory in their semifinal results, at the 2024 Asian Olympic Qualification Tournament in Bishkek, Kyrgyzstan, Yuri Nakazato received a spot due to the reallocations of Individual Neutral Athletes quotas.