The short version
- Retrace your steps first and ask staff at the last place you remember having the item — a surprising share of lost things in Japan turn up this way before a police report is even needed.
- For anything lost on a train, contact that specific operator's lost-and-found center, not the police first — JR East, Tokyo Metro, and Toei each run their own, and items are usually held at the station or a central office for about a week before moving to a regional police lost-property center.
- To file a report anywhere else (street, shop, park), go to the nearest koban (交番, police box) and file an ishitsu todoke (遺失物届). Bring a rough description, and where and roughly when you lost it.
- Lost your phone? Call your carrier's loss/theft line first to suspend the line, before you worry about finding the device itself.
- If it's your residence card or passport, this guide stops at "file a report at a koban, then contact the immigration authorities or your embassy" — the actual reissuance process is outside what a general guide like this should walk you through individually.
Most people's first reaction to losing something in Japan is panic, followed almost immediately by a strange kind of hope, because Japan's reputation for returned lost property is real. That reputation is backed by an actual legal system, not just a national trait, and knowing how that system is organized — by transit operator, then by police jurisdiction — saves you from calling the wrong number first. This guide walks through what to do in the first few minutes, then breaks down the contacts you'll actually need.
Before you file anything: retrace and ask
Go back to the last place you remember having the item, or call ahead if it's a shop or restaurant you can reach by phone. Staff at cafes, supermarkets, and station kiosks in Japan commonly hold onto items customers leave behind for at least a few days before handing them to the police, so a same-day phone call or return visit has a real chance of working before you need to file anything formal.
If a translation app helps you get the question across, use it — staff dealing with a lost-item inquiry are used to fielding it in whatever language shows up, and you don't need fluent Japanese to describe a black wallet or a phone case.
Lost it on a train? Contact the operator, not the police, first
Japan's railways are split among competing operators even within one city, and each one runs its own lost-and-found desk. Contacting the wrong one wastes time, so start with whichever operator's train or station you were actually on.
| Operator | Contact | Notes |
|---|---|---|
| JR East | JR East Infoline, reported as (050) 2016-1603 (also reachable from overseas), English/Chinese/Korean, reported hours roughly 10:00-18:00 — unconfirmed, check the official page below | Items are commonly held at a station lost-and-found counter for roughly a week before transferring to a regional police lost-property center — treat the exact window as approximate and ask the counter directly. |
| Tokyo Metro | Phone inquiries reported as 0570-033-555 — unconfirmed, check the official page below | Check the station office the same day you lost the item; a central lost-and-found center handles items from the following day. |
| Toei Subway/Bus/Streetcar | Phone inquiries reported as 03-3816-5711, reported hours 9:00-20:00 daily, with multilingual phone support reported (English among the languages listed) — unconfirmed, check the official page below | Separate from Tokyo Metro even though both run subway lines in Tokyo — check which company operated the specific line you rode. |
| Private railways elsewhere | Search "[operator name] + 忘れ物" (wasuremono) or ask station staff directly | Every private railway and subway operator (Tokyu, Odakyu, Keio, Hankyu, and dozens of regional operators) runs its own desk; there's no single national number that covers all of them. |
The phone numbers and hours above come from search-engine snippets of each operator's official page, not a direct full read of the current page (see the Sources note near the end of this article) — treat them as a starting point, not a guarantee, and confirm on the operator's own page linked in Sources before you call. If a JR East, Tokyo Metro, or Toei item isn't found through the operator's own desk within roughly the window noted above, it's likely moved to the police system covered in the next section.
Lost it anywhere else: filing a report at a koban
For anything lost on the street, in a shop, in a park, or anywhere that isn't a train system with its own lost-and-found desk, the koban (交番, neighborhood police box) is the starting point. This is also where a train-operator search that comes up empty eventually routes to, since unclaimed items move into the broader police lost-property system after the operator's own holding period.
Bring, or be ready to describe:
- What the item is, including brand, color, and any distinguishing marks
- Roughly when and where you last had it, and your best guess at where you lost it
- Your contact information and, if you have one, a form of ID
Officers will file an ishitsu todoke (遺失物届, lost-property report) and typically give you a reference number or receipt — keep it, since you'll need it if the item turns up and you're asked to identify yourself as the owner. If cash was part of what you lost, mention the approximate amount; it's a normal part of the report and not something that raises suspicion in itself.
How long the police hold onto found items
Under Japan's lost-property law, the police generally hold found items for three months from when they receive them. If nobody claims the item within that window, ownership rights can pass to the person who found it and turned it in — except for items carrying personal information, such as credit cards, ID documents, and phones, which aren't handed over to a finder even after three months in that same way. Treat this as the general framework rather than a guarantee for every category of item; the police lost-property centers themselves are the authoritative source if your case is time-sensitive.
Your phone: call your carrier before you worry about the device
If a phone is part of what you lost, contacting your carrier to suspend the line takes priority over hunting for the device itself — it stops anyone else from running up charges or accessing accounts tied to your number. NTT Docomo, SoftBank, au, and Rakuten Mobile each run a loss/theft support line for exactly this; check your carrier's official support page (linked in Sources) for the current number and hours, since English-language availability and hours differ by carrier. Once the line is suspended, ask about next steps for a replacement SIM. If your phone was your point of contact for everything from banking apps to work email, our guide to phone and SIM contracts in Japan covers what a replacement contract or SIM typically requires.
Cards, IDs, and the My Number card
A lost debit or credit card should go through your bank or card issuer's own loss/theft hotline first — most Japanese banks run a 24-hour line for exactly this, and freezing the card is the priority over the police report, though filing one afterward for your own records isn't a bad idea. Our guide to opening a bank account in Japan has more on how Japanese banks typically expect you to reach them.
If a My Number card is part of what's missing, the general path is to report the loss to your municipal (city/ward) office, which can suspend the card's functions while a replacement is issued; our My Number card guide has more on what the card is used for day to day.
Residence card or passport: where this guide stops
Losing a residence card or passport understandably feels like the highest-stakes version of this problem, and it's also the one where this guide deliberately says the least. File a report at a koban first, the same as for anything else — you'll likely need the reference number later. From there, the actual reissuance process for a residence card runs through the Immigration Services Agency, and for a passport through your country's embassy or consulate in Japan; both involve specific documents, fees, and timelines that are set by those offices, change over time, and depend on your individual circumstances. That's a conversation for the immigration counter or your embassy directly, not something a general guide should try to walk you through step by step.
What this guide doesn't cover
This is a first-response guide to reporting something lost, not instructions for reissuing a residence card, passport, or any other official document, and not legal advice about your rights as a finder or an owner under Japan's lost-property law. It also doesn't cover theft specifically, where police procedure can differ from a straightforward loss — if you suspect something was stolen rather than misplaced, say so when you file the report, since it may be handled differently.
Where this connects
A lost phone or lost cards tend to surface the same questions that come up when you're first setting up in Japan — how a phone and SIM contract works, what a Japanese bank account expects from you, and what the My Number card actually does. If any of this happened while you were also dealing with a package that never arrived, our guide to finding English-speaking healthcare in Japan is a related first-response guide worth bookmarking for a different kind of emergency.
Related reading
- Train etiquette in Japan for commuters — the everyday habits (bags off the shoulder, boarding order) that help avoid the moment this guide is written for in the first place.
Sources
Consulted 2026-08-04, via search-engine results and snippets citing the official domains below. This working environment's direct page fetch was blocked (HTTP 403) for every official domain checked while writing this article, National Police Agency and Tokyo Metropolitan Police Department included, so the facts above — the three-month holding period, the personal-information exception, and each operator's general lost-and-found process — are based on search-engine snippets that quote or summarize these official pages directly, not on a complete direct read of the pages ourselves. Treat the general framework as reasonably solid and confirm exact phone numbers, current hours, and language support on the linked pages before relying on them.
- National Police Agency — lost-property ownership transfer after the holding period: npa.go.jp — ishitsubutsu ownership transfer
- National Police Agency — reporting a found item within 24 hours: npa.go.jp — reporting a found item
- Tokyo Metropolitan Police Department — how long police hold found items (FAQ): keishicho.metro.tokyo.lg.jp — lost and found FAQ
- Tokyo Metropolitan Police Department — Lost and Found Center contact (English): keishicho.metro.tokyo.lg.jp — Lost and Found Center (English)
- JR East — Infoline and customer support contacts: jreast.co.jp — Infoline
- Tokyo Metro — Lost & Found (English): tokyometro.jp — Lost & Found
- Toei Transportation — Lost and Found / Inquiries (English): kotsu.metro.tokyo.jp — Lost and Found
- NTT Docomo — suspending/resuming service due to loss or theft: docomo.ne.jp — loss/theft procedure
- SoftBank — stolen/lost handset support: softbank.jp — stolen/lost handsets