Japanese Watch Condition Grades Explained: 未使用, N, AB, C & ジャンク

If you are buying a pre-owned watch from Japan, the single line that decides most of your risk is the seller’s condition grade — 未使用, 中古AB, ジャンク, and the like. This guide translates the Japanese watch condition grades you actually meet on Yahoo Auctions, Mercari and Japanese dealer sites, explains what each one does and does not promise, and gives you a photo-by-photo self-check so you can read any listing yourself.

One thing up front, because it changes how you read everything below: these grades are set by the seller, not by a national standard. They describe how a watch looks, not whether it is authentic, original or working. Treat a grade as a starting point for questions, never as a guarantee.

What is a Japanese watch condition grade?

A Japanese condition grade is a seller’s shorthand for cosmetic wear — not a certification of authenticity, originality, or working order. The same letter or word can mean different things at two different shops, because each seller writes its own definitions.

In practice you will run into two separate systems, and confusing them is the most common mistake overseas buyers make:

• Marketplace fixed grades — a short drop-down list the seller must pick from on Mercari, Rakuma, PayPay Flea Market and (in a slightly different form) Yahoo Auctions. Everyone on that platform uses the same six or so options.
• Dealer letter grades — the free-form scale a professional pre-owned shop invents for itself (未使用 / SA / A / AB / B / BC / C / ジャンク). The letters look standardized across shops but are not; each dealer publishes its own criteria.

Read the platform first, then the grade. A “B” from a specialist watch dealer and a “傷や汚れあり” tick-box on a Mercari listing are not the same kind of statement.

Marketplace fixed grades (Mercari, Rakuma, PayPay Flea Market)

On Japan’s consumer flea-market apps the seller cannot type a free grade. They choose one of six fixed options from a menu. These are the words you will see most often, because most Japanese pre-owned listings live on these apps.

Japanese (as shown)	Romaji	Literal meaning	What to actually expect
新品、未使用	shinpin, mishiyō	New, unused	Never used by the seller. May still lack tags, box or plastic.
未使用に近い	mishiyō ni chikai	Close to unused	Used very lightly or not at all; looks essentially new.
目立った傷や汚れなし	medatatta kizu ya yogore nashi	No noticeable scratches or dirt	Light use, nothing obvious at a glance. Look closely anyway.
やや傷や汚れあり	yaya kizu ya yogore ari	Some scratches or dirt	Visible wear the seller is flagging on purpose.
傷や汚れあり	kizu ya yogore ari	Scratches or dirt present	Clearly worn. Ask for close-ups of the worst areas.
全体的に状態が悪い	zentaiteki ni jōtai ga warui	Overall poor condition	Heavy wear or known problems. Treat as project-grade.

Mercari’s own English app renders these same six choices as, roughly, New, Like new, Good, Fair and Poor (it collapses the top two into one). The Japanese wording is the source of truth — the English label is a convenience translation.

Yahoo Auctions is self-declared — and has its own red-flag words

Yahoo Auctions (ヤフオク) works differently. The condition is whatever the seller writes, with no platform verification, so you rely on the description and photos far more than on any tick-box. Two Japanese phrases on an auction change the deal completely, and both are common:

• ジャンク (janku, “junk”) — sold with no guarantee of function. See the section below; it does not always mean broken, but it always means “no recourse.”
• ノークレーム・ノーリターン (no claim, no return) — the seller states in advance that they will not accept complaints or returns after the sale. On a four- or five-figure watch, that is a large amount of risk to accept sight-unseen.

Japanese watch dealer letter grades (未使用 / SA / A / AB / B / BC / C / ジャンク)

Professional pre-owned watch shops use a letter scale instead of the app tick-boxes. The letters (SA, A, AB, B, BC, C) are widely shared vocabulary, but the definitions behind them are written by each shop. There is no cross-shop standard, so always read the dealer’s own grade key.

To show what the scale means in practice, here is one Tokyo dealer’s published definitions — The Watch Company — translated. Use it as a worked example of the pattern, not as a universal law:

Grade	Dealer’s Japanese definition (paraphrased in English)
新品 (new)	In the same condition as purchased from the supplier.
未使用 (unused)	Unused, though some scratches or dirt may be present depending on the piece.
中古SA	Used only a handful of times; ultra-clean.
中古A	Few scratches or marks; good condition.
中古AB	Signs of use, but relatively good condition.
中古B	Moderate use with minor scratches or dirt, but satisfactory overall.
中古BC	Evident use, dirt and scratches.
中古C	Considerable wear with noticeable scratches or dirt.
ジャンク (junk)	Significant damage; repair recommended.

Other shops run the same idea with different letters — some add an “N” rank for new-old-stock, some use “S” as their top grade, some skip AB or BC entirely. The takeaway is not the exact letters. It is that a dealer grade is a compressed opinion, and the definition table on that dealer’s site is what actually tells you what the letter means there.

Why 未使用 / N does not mean “unworn” the way you expect

This is the trap that costs overseas buyers the most. In the Western grey market, “unworn” implies a current, shop-fresh piece, usually with full box and papers. The Japanese 未使用 (mishiyō) and the “N” rank some shops use both literally mean unused — but that is a statement about handling, not about age or completeness.

• It can be old stock. A watch can be genuinely unused and still be years old, having sat in a case or a drawer. “Unused” says nobody wore it, not that it left the factory recently.
• It may still need service. Gaskets harden and lubricants dry with time regardless of wear. An unused mechanical watch that has sat for years can still be due for an overhaul before it keeps good time or resists water.
• Box and papers are not implied. A condition grade rates the watch, not the completeness of the set. “未使用” tells you nothing about whether the warranty card, box or links are included — that is a separate field (付属品, fuzokuhin, “accessories”).

So when a listing says 未使用, read it as: “not worn, but confirm the age, the service history, and exactly what is in the box.” Those are three different questions, and the grade answers none of them.

What ジャンク (junk) really means — and when it is still worth buying

ジャンク does not automatically mean the watch is destroyed. It means the seller is selling as-is, with no guarantee that it works and no returns. That covers a wide range:

• A watch that genuinely does not run and needs a movement service.
• A complete, good-looking piece where the seller simply has not tested it (動作未確認, dōsa mikakunin, “operation not confirmed”) and does not want to promise anything.
• A parts/project piece — sometimes a legitimate way to buy a rare reference cheaply if you have a watchmaker.

A ジャンク listing can be a real opportunity or a money pit, and the label alone will not tell you which. Only buy one if you have budgeted for a full service on top of the price, you can read the photos well enough to judge originality, and you are comfortable with zero recourse. For most buyers, a graded piece from a dealer who has actually inspected the watch is the safer path.

美品, 極美品 and other adjectives you will see

Alongside the formal grade, Japanese sellers add descriptive adjectives. These are opinions written in free text, not fixed grades, so weigh them against the photos rather than the words:

• 美品 (bihin) — “beautiful condition.” A positive but subjective claim.
• 極美品 (gokubihin) — “extremely beautiful condition,” a step above 美品.
• 未開封 (mikaifū) — “unopened / sealed.”
• 訳あり (wakeari) — “with issues,” a flag that something is wrong; always read why.

Cosmetic condition vs. originality — two layers a grade blurs together

A condition grade rates how a watch looks. It does not tell you whether the parts are original. These are separate layers, and collectors care about both:

• Cosmetic: scratches, polishing, dial and bezel wear — what the grade measures.
• Originality: whether the dial, hands, bezel insert and crown are the factory parts for that reference, or later service replacements — which the grade does not measure at all.

A watch can grade “SA” on looks while carrying a service dial, or grade “C” on cosmetics while being fully original and therefore more desirable to a collector. And no grade — high or low — is a statement about authenticity. A convincing counterfeit can be described as “美品.” Verifying that a watch is genuine, and that its parts belong to it, is a separate process from reading the grade. If that matters to you, start with our overview of how watch authentication works.

How to read any grade against the listing photos

Whatever the stated grade, the photos are the real evidence. Go through the watch element by element and check the words against the images. If a photo is missing, that absence is information — ask for it.

Part	What to check in the photos
Case & lugs	Sharp or rounded edges? Rounded lugs mean heavy polishing, which a cosmetic grade may not flag.
Bezel / insert	Fading, dents, alignment. On dive and GMT models this is a common wear and originality point.
Crystal	Scratches, chips, or a replacement that does not match the reference.
Dial & hands	Even aging vs. a suspiciously fresh dial (possible service replacement). Lume color should match between dial and hands.
Bracelet / strap	Stretch, missing links, aftermarket clasp. Ask how many links are included.
Caseback / movement	If shown, look for service marks. Many listings never open the case — then movement condition is unverified.
Accessories (付属品)	Box, warranty card, spare links, tags — listed separately from the grade. Confirm exactly what is included.

Other Japanese listing words that change the deal

A few more terms decide how much the grade is worth. Learn these and a Japanese listing becomes readable:

Japanese	Romaji	What it tells you
動作確認済み	dōsa kakunin-zumi	Operation confirmed — the seller states it runs.
動作未確認	dōsa mikakunin	Operation NOT confirmed — running condition unknown.
オーバーホール済み	ōbāhōru-zumi	Recently serviced/overhauled. Ask for the date and shop.
保証書あり / なし	hoshōsho ari / nashi	Warranty card included / not included.
付属品	fuzokuhin	Accessories — box, papers, links. Read this list carefully.
訳あり	wakeari	“With issues” — something is wrong; find out what.

Quick reference: Japanese grade → what to actually expect

You see	Read it as
新品 / 新品、未使用	New. Confirm it is not old stock; check box and papers.
未使用 / 未使用に近い / N	Unused or near-unused — but possibly aged; may still need service; completeness not implied.
SA / A / 目立った傷や汚れなし	Light, unobtrusive wear. Verify with close-up photos.
AB / B / やや傷や汚れあり	Honest used wear. Reasonable if photos back it up.
BC / C / 傷や汚れあり	Clearly worn. Price should reflect it; budget for a service.
ジャンク / 全体的に状態が悪い	As-is, no guarantee. Only for buyers who can absorb repair costs and zero recourse.

Frequently asked questions

Is 未使用 the same as “unworn” or “new”?

No. 未使用 means unused, i.e. not worn. It does not promise the watch is recent, that it has been serviced, or that box and papers are included. A years-old unused mechanical watch can still need an overhaul.

Are Japanese condition grades standardized across shops?

No. Marketplace apps share a fixed six-option menu, but professional dealers each write their own letter-grade definitions. Always read the specific seller’s grade key rather than assuming an “A” means the same thing everywhere.

Does a high grade mean the watch is authentic?

No. A grade rates cosmetic condition only. It says nothing about authenticity or whether the parts are original. Authentication is a separate process — see our authentication overview.

Is a ジャンク watch always broken?

Not always. ジャンク means sold as-is with no guarantee and no returns. It can be a non-runner, an untested piece, or a legitimate parts/project watch. The label tells you the risk, not the exact fault.

Does the grade include the box and papers?

No. Completeness is listed separately under 付属品 (accessories). Read that field on its own and confirm exactly what ships with the watch.

Can I trust a “美品” label?

Treat it as the seller’s opinion, not a measurement. 美品 (“beautiful condition”) is free-text praise; judge it against the actual photos, part by part.

Key takeaways

• Japanese condition grades are set by the seller and rate cosmetics only — not authenticity, originality or working order.
• Marketplace apps use a fixed six-option menu; professional dealers use letter grades with their own, non-standardized definitions.
• 未使用 / N means unused, not “recent, serviced and complete” — confirm age, service and accessories separately.
• ジャンク and ノークレーム・ノーリターン both mean “no guarantee, no returns.” Only accept that risk with a repair budget.
• Whatever the grade, read it against the photos element by element, and treat authentication as a separate step.

This article reflects Japanese marketplace and dealer grading conventions as of August 2026. Because grades are seller-defined, always read the specific seller’s own definitions and confirm details before you commit.

Buying from Japan without guessing at the grade

The safest way to deal with a seller-defined grade is to have the watch inspected before you pay for it. If you are looking for a specific reference, RYUZU WATCHES searches the Japanese market on your behalf and inspects the watch before you commit — so the condition is verified by someone holding it, not just described in a listing. For the taxes, duties and shipping side of a cross-border purchase, see our guide to buying a watch from Japan in 2026.