Lost Item Return Rate Triples: Tokyo Startup Envisions a World Where Nothing Stays Lost

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With the vision of creating "a world where every lost item is found," Find Inc. runs "find," a cloud-based lost-and-found service powered by proprietary AI technology. First introduced by Keio Corporation in 2023, the service is now used by 33 companies nationwide. We spoke with Wada Ryu, Director and COO of Find Inc., about how technology is transforming the future of lost items.
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Tokyo Metropolitan Police stations receive around 4.4 million lost items annually. Photo: PIXTA

This audio is generated by AI, so pronunciation and expressions may not be fully accurate. The narration is only in English.

An Idea Sparked by a Lost Item

Find Inc. is a Tokyo-based startup that provides a cloud service dedicated to lost items. The company was founded in December 2021 by Representative Director Takashima Akira and COO Wada Ryu.

"We had been discussing starting a business together when Takashima lost something on a business trip. That experience revealed many challenges related to lost items and inspired us to create a service focused on addressing them. That became the starting point for find," Wada recalls.

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Takashima's experience of losing something inspired the vision for a smarter lost-and-found system.

Partnering with Keio to Scale Up

As Takashima and Wada looked for ways to turn their idea into a viable business, they found a partner in Keio Corporation. The operator of the Keio Line and Inokashira Line in western Tokyo, Keio manages 69 stations and fields around 500 lost items inquiries each day. To handle this workload, 10 to 14 staff members are regularly assigned to lost-and-found operations.

"We were given a look behind the scenes at Keio Corporation, and we were struck by just how demanding the work was for the staff," Wada recalls. "What left the strongest impression was the way they treated each lost item with such care, always thinking of the customer. That experience made me realize the scale of the challenge, and it was the starting point for proposing find as a solution."

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In Keio Corporation's back office, lost items is neatly stored.

In October 2022, Find Inc. was selected for the Keio Open Innovation Program, Keio Corporation's initiative to co-create value with external partners. A proof-of-concept (PoC) trial commenced in February 2023, and by May, the service had been officially adopted. Wada recalls spending the trial period on-site every day, listening to staff feedback and feeding it back into the product. Through this collaboration with Keio, find evolved into a lost items service designed to meet on-the-ground needs.

From Managing Lost items to Finding It with AI

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A dedicated chat, searchable database, and registration tools connect owners with staff on the ground.

The biggest strength of find is its use of AI to streamline the process. Conventional systems required staff to enter every detail of a lost item manually, but with find, all it takes is a photo. The AI automatically analyzes features such as color, shape, and size, and registers the information together with the image.

"For umbrellas, for instance, staff used to type in every detail—from the color and pattern of the fabric to the shape of the handle and even signs of wear. Registering a single lost item could take around ten minutes. With find, it's done in about one. Since railway companies register over 10,000 lost items a month, saving 9 minutes per entry adds up to a huge efficiency gain and a major benefit for the business."

Unlike conventional systems that focused mainly on managing lost items, find is designed with the goal of returning items to their owners.

With find's database supporting image searches, even simple wallets or accessories that were once hard to identify through text alone can now be matched. All communication with owners takes place through a dedicated chat system called "find chat," which makes it easier to inquire at any time than by phone—greatly enhancing user convenience.

During the PoC trial with Keio Corporation, introducing find cut lost items inquiries by phone and at station counters by about one-third, while the rate of returned items nearly tripled.

Making Tokyo a City Where Every Lost Item Is Found

Tokyo is home to about 14 million people. Additionally, more than 500 million visitors from Japan and abroad visit the city each year, making it the location with the highest number of lost items incidents in the country. The Tokyo Metropolitan Police Department reports that in 2024, a record 4.4 million lost items were turned in to police stations across the city. That figure does not include items found and returned within companies or facilities before they ever reach the police, meaning the actual total is even higher.     
Wada's goal is to bring find's mission—"a world where every lost item is found"—to life across Tokyo first.

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"We hear countless words of thanks every day, from both those who recover lost items and the staff handling them," Wada says.

"find is already in use with major transportation operators in Tokyo, but our vision is a world where every lost item can be found—whether it's left in a restaurant or dropped on the street. To make that possible, working closely with the police and local governments is essential."

find's tools are already being used in some police stations to help manage lost items. The next step is to broaden that collaboration and create a citywide lost items service for Tokyo.

"First, we want to make it possible here in Tokyo, where we were born and raised, to find anything that's lost, no matter where or what it is, through find. If we can achieve that, it can become a model for expanding across Japan and overseas."

After its rollout at Keio Corporation, find has expanded to transport infrastructure across Tokyo, including Tokyo Monorail and facilities around Tokyo International Airport (Haneda). And in April 2026, Japan's largest railway company, JR East, is set to adopt the system as well.

In March 2025, Keio Corporation received the Prime Minister's Award, the top prize at the government's Digi-den Koshien program promoting the Vision for a Digital Garden City Nation. In June, the Bureau of Transportation, Tokyo Metropolitan Government(TMG), which also uses find, received the Tokyo Good Service Award at the TMG's DX Awards 2025. Both honors highlight the recognition these organizations are earning for advancing digital transformation in the field of lost items.

Taking Japan's Lost-and-Found Culture Global

With inbound tourism on the rise, find is expanding its multilingual support. The service now offers Japanese, English, Chinese, and Korean, with plans to cover more than 100 languages in the future.

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With automatic translation enabling multilingual support, an increasing number of international users are turning to find chat.

As part of its new service initiatives, find launched a PoC trial of find Reuse in February 2025, running through the end of August. The program takes unclaimed lost items that have passed the legally required holding period and would otherwise be discarded, and sells them on the online marketplace Mercari Shops, operated by Mercari, Inc. In addition to contributing to the SDGs, the initiative returns proceeds to participating companies, helping to offset the costs of managing lost items.

A world where every lost item is found depends on people taking the simple step of handing in what they pick up. By sharing Japan's culture of treating lost items with care, find hopes to spread that spirit worldwide and help make such a world a reality. Acting as a bridge of trust and reassurance, find will continue to grow from its base in Tokyo while expanding its network.

Wada Ryu

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Director and COO, Find Inc.
Wada began his career at MTI Ltd., where he planned smartphone apps before co-founding CARADA Medica Inc. as a new business within the company, serving as a representative director. He later led the AI strategy business at Automagi Inc. In December 2021, he co-founded Find Inc. with Takashima Akira and became its Director and COO.
Interview and writing by Kato Natsuko
Photos by Find Inc.
Translation by Luna Lys