Hikarigaoka

 (光が丘公園) is a district in the, and the original home of the eight Chosen Children who fought in the Digital World in 1999.

This place is notable for being in the other end of a Digital Gate, which is highly vulnerable for breaching.

In 1995, a Parrotmon emerged from the gate, and fought a battle with a Greymon that emerged as an egg from the computer of the Yagami family. Many children saw the battle with their own eyes, including the eight future Chosen Children, who were chosen that night to protect the Digital World in the future. The damage caused by the battle was attributed to a terrorist bombing, prompting the children's families to move away.

Seven of the eight Chosen Children returned to Hikarigaoka and remembered the event, and hypothesized that the remaining Chosen Child must have been from Hikarigaoka too. They searched for all the children who moved away from Hikarigaoka after the attack, but it later turned out that the eighth Chosen Child had been Yagami Hikari all along.

Oikawa Yukio brought the children he kidnapped to Hikarigaoka, where he was halted by Demon. The younger Chosen Children, who had been chasing Oikawa, stopped to fight Demon and save the district by exploiting the Digital Gate and forcing Demon into the World of Darkness. Oikawa managed to escape, not before instructing the kidnapped children to meet him in the district on December 31st. The older Chosen Children's Digimon spent several days to try and seal the Digital Gate to Hikarigaoka, but they were not quick enough. After Black War Greymon was critically wounded by Oikawa several days later, he decided, with his final breath, to seal the Digital Gate for good. However, Oikawa and the kidnapped children still met up in Hikarigaoka on December 31st, but instead of going through the sealed Digital Gate, they ended up in one of the worlds parallel to the Digital World, a world of dreams.

The Chosen Children go to Hikarigaoka in Episode 34, "Mammon, the Great Clash at Hikarigaoka!" to search for the eighth Chosen Child. Piyomon was surprised at the apartment complex, likening it to a castle, with Takenouchi Sora explaining that lots of people lived in it, which only amazed Piyomon and Koromon even more. Piyomon then asked Sora if she lived there too, which she did, as did Yagami Taichi who was in the same class, Ishida Yamato who was in a different school; and Kido Jo, Tachikawa Mimi and Izumi Koshiro who were in the same school but the latter two were in kindergarden. This made them realize that all of them lived in Hikarigaoka in the past, which couldn't be a coincidence. Nonetheless, Taichi wanted to focus on Vamdemon who had to have done something at this point, though Koshiro didn't agree, as the flow of time was different between the two worlds and only about a minute would've passed between Vamdemon and the Chosen Children arriving in the Real World.

On top of a building, Vamdemon gave Pico Devimon and Tailmon copies of the eighth Chosen Child's Tag and Crest, with the original in his possession. Despite being copies, they would react if they were close to the eighth Chosen Child.

The Chosen Children kept talking to each other about their memories of Hikarigaoka, with Koshiro pointing out he lived there for less than a year, with Jo thinking it was due to the terrorist bombing which happened four years ago, which caused the Chosen Children's parents to move out as they thought it was too dangerous to stay in Hikarigaoka, especially since the culprit was never found. Suddenly, the ground shook, as a Mammon walked through Hikarigaoka and attacked passerbys who thought it was an elephant or part of a movie. The Chosen Children went to stop it, with Koromon evolving into Agumon to do so.

After defeating Mammon, Taichi mused about people seeing Vamdemon's Digimon, and Takaishi Takeru likened them to giant monsters, which reminded Yamato about how the former got scolded when they lived in Hikarigaoka for saying he had seen giant monsters. The Chosen Chidren realized that the terrorist bombing had been a Digimon attack, and Taichi remembered the events of said attack, when he and Yagami Hikari watched a Koromon, who was now a gigantic Greymon, fighting a Parrotmon, and how Greymon was beaten by Parrotmon, but Taichi got him back to his senses using Hikari's whistle. Taichi then remembered the rest of that day, how a Koromon appeared at their house, and that Koromon evolved into Agumon and Greymon and fought Parrotmon, then they both disappeared. Taichi's own Koromon thought that had to be a different Koromon, though he felt nostalgic when he met Taichi for the first time. The Chosen Children then heard other people talking about how they saw monsters, which caused them to run away. Koshiro then pointed out that he always found it weird how they were the only children at the camp that were sent to the Digital World, but now he had his answer as to why that happened, that they all met Digimon four years ago, and the same should be true for the eighth Child. Jo wondered if that meant that Vamdemon had already found the eighth Child in Hikarigaoka, though Mochimon thought that Vamdemon's army was likely still looking for them all over Hikarigaoka just like Mammon had been. Mimi wondered how they'd find them first, and Koshiro pointed out they had another thing in common: how they had all moved from Hikarigaoka. Taichi then realized that the eighth Child had to be in Odaiba and they had to go there.