Tokyo's Paper Trail Problem: How Duplicate Image Records Are Costing Residents Time and Money

Tens of thousands of resident registration records held by Tokyo's 23 special ward offices contain duplicate photographic images — identical or near-identical files stored under different ID numbers — creating cascading errors in everything from residency certificates to long-term care eligibility checks, according to municipal records review processes underway this year. The Tokyo Metropolitan Government confirmed in its fiscal 2025 digital reform report that image data inconsistencies in the Juki Net resident registry system remain a priority remediation target for the current fiscal year ending March 2027.

The timing matters. Japan's My Number card rollout, which the national government has been pushing since 2016 and dramatically accelerated after 2022, has funneled an unprecedented volume of photographic identity data into systems that ward offices were not originally built to manage at scale. As of April 2026, the Ministry of Digital Affairs reported that My Number card adoption nationwide had crossed 80 percent of the eligible population. When residents update cards, change addresses, or register for the long-term care insurance system under the Kaigo Hoken program, their image files can be duplicated across databases that do not automatically reconcile with each other.

The Ward Office Bottleneck

In Shinjuku Ward, staff at the main office on Kabukicho Ichiban-gai's administrative corridor have been manually flagging duplicate entries since January 2026 as part of a pilot data-cleaning exercise. Shinjuku is a logical starting point: its population includes a high concentration of foreign nationals registered under the residence card system, and the ward processed more than 140,000 address-change notifications in fiscal 2024 alone, according to Shinjuku Ward's published administrative statistics. Each notification carries a risk of generating a redundant image record if the receiving system does not correctly overwrite the existing file.

Minato Ward, home to the Azabudai Hills development and a sharp uptick in high-income relocations since 2023, is facing a parallel crunch. Residents applying for the ward's elderly day-service programs — which require biometric verification tied to the long-term care insurance number — have reported delays of up to three weeks when their image records trigger a duplication flag. For an 80-year-old waiting on a care placement decision, three weeks is not a bureaucratic abstraction.

The housing market dimension is also real. Central ward condominium listings in Minato and Chiyoda have been pushing above ¥1.5 million per square meter for new builds in 2026, and buyers financing through government-linked lenders like the Japan Housing Finance Agency must submit identity verification tied to My Number records. A duplicate image flag can stall loan processing at a moment when mortgage rate windows are measured in days, not weeks.

What the Fix Looks Like — and When

The Tokyo Metropolitan Government's Digital Services Bureau, operating from its Nishi-Shinjuku headquarters, has contracted a systems review that is supposed to produce a de-duplication protocol by October 2026. The protocol would introduce an automated hash-matching check each time a photographic image is written to the resident registry, comparing the incoming file against existing records before committing the entry. Smaller municipalities in Aichi and Fukuoka prefectures have already tested versions of this approach.

For residents, the practical advice is immediate and simple. Anyone who has changed address within Tokyo in the past 18 months, renewed a My Number card, or newly enrolled in the Kaigo Hoken system should visit their ward's resident affairs counter — or use the MynaPortal app — to confirm their image record shows a single, current file. Processing times at most ward offices are shortest on Wednesday mornings before 11 a.m. Shinjuku Ward's resident affairs division can be reached directly at the Kabukicho civic center annex without an appointment for basic record confirmation requests.

The broader digital integration push is not slowing down regardless. The national government's 2025 Digital Society Formation Basic Plan calls for full interoperability between municipal and national identity databases by fiscal 2028. Getting the image data clean before that deadline is, for Tokyo's ward offices, not optional — it is the foundation everything else gets built on.