The International Paralympic Committee (IPC) has confirmed marathon races at the Tokyo 2020 Paralympic Games will remain in the city.
There was conjecture around the events after the Olympic marathons and race walks were moved from the Japanese capital to Sapporo.
Originally on the timetable for August 2, the women's race was also pushed back six days to August 8, while the men's marathon stays on August 9 in the new location, the final day of competition, following tradition.
The decision not to move the Paralympic marathon was announced at the end of the eighth IPC Tokyo 2020 Project Review, after a thorough analysis of the 2019 heat and humidity data following consultation with athletes during November's World Para Athletics Championships.
Five marathon medal events are still due to take place on September 6, the final day of competition, at 6.30am.
"The health and well-being of our athletes is a top priority for us at all times and before taking a final decision to keep the Paralympic marathon events in Tokyo, it was vital for us to analyse all the relevant data and speak to the athletes themselves," IPC President Andrew Parsons said.
"The weather data, which was reviewed by the IPC Medical Committee, revealed that although the Games period in 2019 was slightly hotter than in 2018, the temperatures around the time the marathon events will take place were within all our thresholds for safe and optimal competition.
"When we spoke to athletes, the overwhelming response was that they want to remain in Tokyo."
Parsons added: "With many marathon athletes also competing in track events during the Games, a move would be logistically difficult for them to accommodate.
"The marathon is also the last event of the whole of Tokyo 2020 and athletes believe competing on the streets of the city in a free event that anyone can attend is a way of saying thank you for the tremendous support Tokyo residents have shown the Paralympic Movement over the last seven years."
The start time of the triathlon events on August 29 and 30 has been brought forward from 7.30am to 06.30am, with the first races involving the classes of athletes most impacted by the heat.
International Triathlon Union (ITU) President Marisol Casado said: "For the ITU, as well as for the IPC, the health and safety of our athletes is paramount.
"After the test event that we held this past summer, and considering all the weather reports, it is safer to start Para-triathlon races one hour earlier, so that Para-triathletes can finish all the races before the expected heat strikes in Tokyo.
"The new start times, along with all the counter heat measures will allow all the athletes to compete at their best in Tokyo.
"We are completely sure that even with these early start times, the streets of Tokyo will be packed with spectators cheering for the Para-triathlon superstars and that we will have all the conditions for delivering safely the best Para-triathlon spectacle in the world."
The Paralympic Games are scheduled to take place between August 25 and September 6.