Amazon changed the rules again. Selling on Amazon Japan has felt like that for years now — the rules shift faster than I swap out my listing images.
Here is the blunt version: Amazon Japan is not the US marketplace with a different language. If you have not figured out how stock gets into FBA Japan warehouses, how consumption tax works, and how to survive returns, more sales will only kill you faster. My first shipment nearly died at customs. Here is everything I learned from that mess.
Getting Stock In: The First Wall at FBA Japan Warehouses
My first Japan shipment went out in the fall of 2024 — 300 cartons of desktop storage boxes by sea freight. Before I booked anything, my forwarder asked me one question: do you have your ACP sorted? I had no idea what an ACP was. Lucky he asked early.
The rule is simple and unforgiving. If you do not live in Japan and you want to import goods into an FBA Japan fulfillment center, you must appoint an Importer of Record (IOR) and/or an Attorney for Customs Procedures (ACP) before the goods arrive. Amazon will not act as your IOR or ACP. If your shipment reaches customs and nobody is on record to claim it, clearance stalls, and storage and demurrage charges burn money by the day. I know a seller who learned this the hard way: his stock sat at the port for two weeks while his listing sat at zero inventory, watching competitors eat his traffic.
My routine now is fixed. Two weeks before shipping, the ACP is appointed, the authorization paperwork is reviewed, and the customs declaration details are confirmed — then I book the freight. The forwarder moves boxes. Import compliance is your own problem. Nobody else carries it for you.
One more detail: inbound labeling for Japan is not the same game as the US. FNSKU labels, carton markings, per-carton quantities and weights — get one wrong and the shipment can be rejected or relabeled. My habit now is to send the packing list to both the forwarder and the ACP for a second look before sealing anything. Half a day of double-checking saves a week of arguing.
Consumption Tax: The 10% and the 8% Are Not Interchangeable
Consumption tax is where most Japan sellers get their math wrong. The standard rate is 10%. The reduced 8% rate applies to food and beverages only — no alcohol, no dine-in meals — so for most sellers it is irrelevant. When I started selling Japanese tableware sets, I assumed that being "food-adjacent" might qualify me for 8%. My tax accountant shut that down in one sentence: the 8% rate is for the food itself. Tableware is 10%.
At the border you pay again: import consumption tax, calculated on the CIF value plus customs duty, at the same standard 10% rate. Customs collects it when the goods are released, whether or not you are a registered consumption tax payer. The difference is what happens next. Once you register as a qualified invoice issuer, the import tax you paid can be claimed as an input credit when you file. Unregistered, you just absorb it.
My decision framework for registering comes down to two questions. First, the hard threshold: if your taxable sales in Japan in the base period — two years earlier — exceeded 10 million yen, registration is on the table. Second, your customer mix: how much of your business is B2B? Since October 1, 2023, Japan's qualified invoice system means business buyers can only claim input tax credits when they hold a qualified invoice from a registered seller. If you are not registered, buying from you costs a business customer extra tax. Big orders will quietly go elsewhere.
A quick worked example, using only the published rates: take an item with a tax-inclusive price of 11,000 yen. The consumption tax inside that price is 11,000 × 10 / 110 = 1,000 yen. The more you sell, the more that 1,000 yen matters. Registered, it becomes part of a credit chain you can manage. Unregistered, it is pure cost. After registration you file returns on a schedule — and for the actual filing, get a Japanese tax accountant. Do not file off a template you found online.
One more honest warning: FBA fees, referral fees, and storage fees on Amazon Japan follow Amazon Japan's own rate card, and it changes. Fee screenshots from the US marketplace or from last year do not transfer. Before you model profit, pull the current rates for your category and size tier from Seller Central. Treat Amazon Japan's official pages and your tax accountant's advice as the final word.
Returns: The 30-Day Rule and My Three-Tier Playbook
Amazon Japan's return policy generally allows returns within 30 days of receipt. Japanese shoppers do not return things at crazy rates, but they write unusually careful return reasons — "the color differs from the photo," "smaller than I expected." Every one of those is free product feedback.
I got burned on this once. In the second week after launching a storage box, returns suddenly doubled and "wrong size" started appearing in reviews. It took me a while to find it: the Japanese detail page had a botched unit conversion, centimeters mismatched against inches. Japanese buyers measure carefully. Since then, every Japanese detail page of mine gets proofread by a native speaker before it goes live. Machine-translated listings are a self-inflicted wound.
My returns playbook has three tiers. When FBA sends something back: packaging intact and resellable, it goes straight back into sellable stock. Packaging damaged but product fine, it gets repackaged and relisted. Product itself defective, it gets scrapped — no patching and reselling, because Japanese shoppers have close to zero tolerance for flaws. I review return data weekly. When one SKU's return reasons cluster, I check the detail page and the product itself first, not the buyers.
Three Fulfillment Routes: FBA, Self-Ship, or a Japan Third-Party Warehouse
There are three ways to fulfill on Amazon Japan, and I have run all of them. The honest comparison:
| Factor | FBA Japan | Self-fulfillment | Japan third-party warehouse |
|---|---|---|---|
| Delivery speed and Prime eligibility | Best by far | Worst | Middle, depends on warehouse location and courier deals |
| Returns handling | Amazon handles it, low effort | All on you | Warehouse follows your rules |
| Cash tied up in stock | Heavy | Lightest | Middle, small-batch replenishment possible |
| Control | Weakest, Amazon sets the rules | Strongest | Middle, custom processes negotiable |
Here is the counter-intuitive call: FBA is not always the best answer on Amazon Japan. For a new product launch, the Prime badge is close to mandatory — without it, conversion never gets going. But once a product stabilizes, heavy, bulky, or high-return SKUs can work out cheaper with self-fulfillment plus a third-party warehouse. What you save on storage and returns handling can outweigh the Prime badge. My approach: launch on FBA to build ranking, then after three stable months, re-run the numbers per SKU on return rate and dimensional weight, and move the ones that should move.
On replenishment, my rule of thumb is 45 days of cover in stock plus 15 days of in-transit buffer. A stockout on Amazon Japan hurts more than on the US site. Lose ranking once and climbing back costs double the ad spend. I would rather carry two extra weeks of inventory than go out of stock.
Pitfalls Worth Dodging
A few traps I have watched sellers walk into. First, copy-pasting US playbook onto Japan — fees, labels, and return rules all differ. Second, sorting out the ACP and tax registration after shipping, then watching stock idle at customs while the listing runs dry. Third, skipping consumption tax registration and filing because "sales are small," then discovering you cannot serve business buyers who need invoices. Fourth, launching machine-translated Japanese detail pages and letting the return rate teach you the lesson.
Amazon Japan is a good market. Shoppers are picky but loyal, and repeat purchases, once earned, are solid. Get stock in cleanly, get the tax math right, and hold the returns line — the rest is basic product selection and operations. This approach worked for me, tested in my own shop.
By Ah K, E-commerce Seller (5 yrs)
