Last year, more than 18,000 older people living with dementia left their homes and wandered off in Japan. Almost 500 were later found dead.
Police say such cases have doubled since 2012, underscoring a growing strain on the world's oldest society.
The crisis is further compounded by a shrinking workforce and tight limits on foreign workers coming in to provide care.
Japan's government has identified dementia as one of its most urgent policy challenges, with the Health Ministry estimating that dementia-related health and social care costs will reach 14 trillion yen ($90bn; £67bn) by 2030 - up from nine trillion yen in 2025.
In its most recent strategy, the government has signalled a stronger pivot toward technology to ease the pressure.
Across the country, people are adopting GPS-based systems to keep track of those who wander. Some regions offer wearable GPS tags that can alert authorities the moment a person leaves a designated area. In some towns, convenience-store workers receive real-time notifications – a kind of community safety net that can locate a missing person within hours.
Other technologies aim to detect dementia earlier. Fujitsu's aiGait uses AI to analyse posture and walking patterns, picking up early signs of dementia – shuffling while walking, slower turns or difficulty standing – generating skeletal outlines clinicians can review during routine check-ups.
Meanwhile, researchers at Waseda University are developing AIREC, a 150kg humanoid robot designed to be a future caregiver. It can help a person put on socks, scramble eggs and fold laundry. The scientists hope that in the future, AIREC will be able to change diapers and prevent bedsores in patients.
Similar robots are already being used in care homes to play music to residents or guide them in simple stretching exercises. They are also monitoring patients at night - placed under mattresses to track sleep and conditions - and cutting back on the need for humans doing the rounds.
While devices and robots offer new ways to assist, though, human connection remains irreplaceable. Robots should supplement, not substitute, human caregivers, Mr Miyake, the Waseda University scientist said. While they may take over some tasks, their main role is to assist both caregivers and patients.
At the Restaurant of Mistaken Orders in Sengawa, Tokyo, founded by Akiko Kanna, people stream in to be served by patients suffering from dementia. Inspired by her father's experience with the condition, Ms Kanna wanted a place where people could remain engaged and feel purposeful.
Despite his cognitive decline, one server enjoys the interaction, using flowers to remember which table ordered what. For his wife, the café provides respite and helps keep him engaged.
Kanna's café illustrates why social interventions and community support remain essential. Technology can provide tools and relief, but meaningful engagement and human connection are what truly sustain people living with dementia.
