Ruins Detective
At archaeological sites, families piece together the layout of an ancient capital from on-site clues and leave with an evidence-backed reconstruction of their own.
When parents or teachers bring children to sites such as Asuka or Fujiwara Palace, they first select the children’s ages, the length of the visit, and the size of their group. From their current location, the phone sends out short task cards: find a change in elevation, identify a pattern of postholes, examine a roof-tile motif, or stand in a specified direction and compare a road with the ancient central axis. Instead of seeing a completed reconstruction first and then checking off photo stops, children collect clues as they walk that can support their own inferences.
With each completed task, another layer appears on the blank landscape: a building, road, or ceremonial space. Children can drag these newly revealed elements into the positions they think make sense. When they place something incorrectly, the app does not simply give the answer; it asks questions such as, “Which gate should this road face?” or “What does the spacing of these postholes suggest?” A parent view shows the walking distance to the next stop and places to rest, so the tasks do not turn the outing into a long lesson.
At the end, the system combines the evidence a child found, the reconstruction positions they chose, and their on-site photos into an “My Inferred Fujiwara Capital” card. Each building layer can be opened to see museum materials, archaeological evidence, and points that remain disputed. That makes it easier to continue the conversation at home, while teachers can collect a class’s different reconstruction versions.
The first version would create tasks for a small number of sites with clear routes and substantial public documentation, prioritizing family half-day outings and school visits. It does not present uncertain reconstructions as historical fact, nor require children to finish every question before receiving a complete map.
Why now
“Asuka-Fujiwara: Archaeological Sites of Japan’s Ancient Capitals and Related Properties” was inscribed on the World Heritage List on July 26, and families and schools planning visits will need more help reading sites defined largely by their archaeological remains. S1S2 As observed on July 27, this search trend was still continuing, with 20,000+ searches and 500% growth.
Target user
Its core users are parents visiting the Asuka and Fujiwara area with elementary-school children. Faced with a broad expanse of open ground, adults often struggle to turn postholes and terrain into a story children can understand. Teachers leading group visits likewise need short tasks that hold attention without slowing the whole group. This is a useful moment to turn observation into inference and encourage children to keep questioning reconstruction conclusions.
Minimal entry point
Start with the Fujiwara Palace Site as a web app, avoiding the download barrier for half-day visits. Editors manually mark routes, task zones, and rest stops. Phone location only determines which task area is nearby; it does not attempt centimeter-level alignment. Clues are collected through the camera, multiple-choice questions, and simple direction judgments. Begin with a 2D overhead reconstruction layer, where children drag road and building outlines. Every answer is tied to its source, confidence level, and explanation of any dispute. In poor connectivity, cache the map, task assets, and submission queue. Do not build a panoramic 3D palace in the first version; prioritize content review and outdoor reliability.
Punching above its weight
Reach the first users through family-outing content around the Fujiwara Palace Site. Offer one short route to try free, with a completed card that includes the site name and an evidence summary. Parents share not an ordinary check-in photo, but the ancient-capital layout their child inferred. A one-page visit pack can reach social studies teachers and educational-trip organizers. Search traffic from World Heritage coverage can lead to a no-install trial page.
Competitors & gaps
- XR Fujiwara PalaceGoogle
- XR Fujiwara Palace already offers an on-site experience at the Fujiwara Palace Site. S3 Visitors can view reconstructed scenes that change as they move across a broad area, with several fixed points for looking around highly detailed reconstructions. Its strength is making the vanished palace visible with immediate visual impact. Ruins Detective does not need to duplicate costly, scene-level reconstruction. The gap is that children mainly view a predetermined answer rather than search for evidence. It also does not connect postholes, terrain, and road orientation into a process of inference. The opening is to have children decide first and reveal the reconstruction afterward, while allowing multiple reasonable answers. The final card can also record which on-site clues informed the child’s reasoning.
- Oka Castle Time-Travel Walk AR GuideGoogle
- Oka Castle Time-Travel Walk combines historic-site guidance, reconstruction images, and audio. S4 Visitors scan markers on site to see Edo-period castle scenes, with multilingual support for independent general visitors. Its experience relies on preset points of interest and explanatory content, creating a relatively fixed path to understanding. Ruins Detective can focus on family and school visits. Rather than requiring children to listen at every stop, its tasks ask them to observe and make spatial judgments. Prompts should point to evidence rather than reveal reconstruction locations directly. A teacher view can also compare students' different layouts and their reasons. The real gap is not more reconstruction imagery, but letting on-site evidence change what appears on screen.
How it makes money
Sell family packs per heritage-site route, and charge schools by class and visit session. The base map is free; paid packs include the full set of tasks, a personal reconstruction card, and a teacher summary page.
The case against
Location drift can direct children to the wrong place, while bright outdoor light makes screens and photography harder to use. If routes depend on continuous connectivity, weak signals can interrupt tasks entirely. The heavier cost is content review: every prompt needs an archaeological basis. S2 Where reconstructions are disputed, answer design cannot package one hypothesis as a settled conclusion. Age-based difficulty also needs repeated field testing: if tasks are too hard, parents will answer for children; if too easy, the experience becomes a scavenger hunt. School sales also involve device management, privacy consent, and group pacing. Without ongoing review from site managers or researchers, content maintenance could exceed what a solo developer can sustain.