About this app
What Taikyo Check does
Moving out of a rental in Japan too often ends with a shock: a genjo kaifuku (restoration) invoice demanding full wallpaper replacement, tatami work, floor repair, and cleaning — sometimes hundreds of thousands of yen. Yet the national MLIT guideline is clear: normal wear and aging are the landlord's cost, and materials depreciate over a statutory useful life. Wallpaper, for example, falls to a residual value of just one yen after six years. Japan's National Consumer Affairs Center logs more than ten thousand consultations on exactly these disputes every year, and hiring a human deposit consultant costs 16,000 to 24,000 yen — often more than the disputed amount itself. Taikyo Check puts the guideline math in your pocket. Enter each line of the invoice — wallpaper, tatami, flooring, cleaning, key exchange — along with how long you lived in the unit, and the app computes the lawful tenant share using the statutory useful-life depreciation the guideline prescribes. What looked like an 88,000 yen wallpaper bill after six years of tenancy is, under the guideline, a one-yen residual. Your strongest position starts on day one, not move-out day. The move-in binder walks you room by room, capturing timestamped photos of every wall, floor, and fitting, so pre-existing scratches and stains can never be billed to you years later. When move-out day comes, the itemized challenge sheet compares the landlord's quote against your computed share line by line, and the letter builder drafts a polite, firm negotiation letter in Japanese that cites the relevant guideline sections — ready to send or to bring to a consumer affairs consultation, with a PDF export of your full evidence file. Everything stays on your device. No account, no server, and your photos and dispute details are never shared with anyone. Taikyo Check is a reference and record-keeping tool based on the publicly available MLIT guideline. It does not give legal advice, and special contract clauses (tokuyaku) in your individual lease may change what applies to you. • Depreciation calculator built on the MLIT guideline useful-life tables • Line-by-line invoice challenge sheet with your computed lawful share • Timestamped move-in photo binder, organized room by room • Japanese negotiation letter builder citing guideline sections • PDF export of evidence and calculations for consumer center visits • Fully offline and private — your records never leave your phone
Features
Built to be useful, not noisy.
Depreciation Calculator
Enter an invoice line (wallpaper, tatami, flooring, cleaning, key exchange), the quoted amount, and your years of tenancy; the app applies the MLIT statutory useful-life depreciation curve and returns the lawful tenant share — down to the 1-yen residual for fully depreciated items.
Move-In Photo Binder
A room-by-room walkthrough on day one of the lease: capture timestamped photos of every wall, floor, fixture, and existing scratch, organized by room, so nothing pre-existing can be billed at move-out.
Invoice Challenge Sheet
Recreates the landlord's restoration invoice line by line next to the guideline-computed tenant share, totals the gap, and flags items the guideline assigns to the landlord (normal wear, aging, sun-fading).
Negotiation Letter Builder
Generates a polite, formal Japanese letter disputing the overcharged lines, citing the specific MLIT guideline sections and the depreciation math, ready to send to the management company or bring to a consumer affairs center — with full PDF export of letter, sheet, and photo evidence.
Guideline Reference
A plain-language, Japanese-and-English library of what the MLIT guideline actually says: who pays for what, the useful-life table by material, and what a tokuyaku special clause can and cannot override — with the mandatory not-legal-advice disclaimer.
Why it exists
The problem
Japanese tenants get billed for full wallpaper, tatami, and cleaning restoration at move-out even though the MLIT guideline assigns normal wear to the landlord and depreciates materials to a 1-yen residual over ~6 years. NCAC logs ~13,000 consultations a year on this, the only human alternative (敷金診断士) costs 16,000-24…
What's different
How Taikyo Check stands out
The only tenant-side app that encodes the MLIT restoration guideline as a calculator plus an evidence system. Versus competitors: 敷金診断士 consultants charge 16,000-24,000 yen per case, are slow, and are not preventive; Remodela AI退去検査 and GMO賃貸DX are B2B inspection tools sold to landlords and property managers — the opp…
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FAQ
Questions about Taikyo Check
How much does Taikyo Check cost?▾
Taikyo Check is free. All features are included from day one — no subscription, no in-app purchases, no paid tiers. Everything you see in this listing works the moment you install it.
Where does Taikyo Check store my data?▾
On your device. Taikyo Check is built privacy-first: no account is required, no analytics SDKs, no third-party trackers. Nothing is uploaded to a server we control — the app works without one.
What platforms does Taikyo Check support?▾
iOS, on iPhone and iPad. You can find the latest availability on this page.
How do I get support for Taikyo Check?▾
Use the Support link on this page, or email support@allthingsn.com. We answer every message and keep responses on the same thread.
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