CASE STUDY | JAPAN
A Japanese Amazon seller had flat monthly sales around 5 million JPY, a complaint rate that would not drop, and FBA stock that was either short or stuck. The product was being shipped to Japan with a label change instead of a 100 V specification. We re-specified the motor for Japanese mains, added per-batch aging and pressure testing, and planned production against FBA replenishment cycles. The listing now sits in the Top 3 of its category and monthly sales are more than three times the starting point.
100 V
Japan mains specification
Top 3
category ranking on Amazon JP
FBA rhythm
replenishment scheduling
01The client
A Japanese e-commerce seller of hardware and general machinery, running Amazon Japan as its main channel.
Before we started, monthly sales sat around 5 million JPY and had stopped moving. The ceiling was not traffic: complaint rates were high, returns were expensive, and FBA stock levels swung between out-of-stock and overstock.
02What was blocking growth
110 V was treated as an afterthought
Compressors built for other markets were shipped to Japan with a label change. Motor performance under 100 V supply fell short, and failure rates followed.
After-sales cost ate the margin
Repair and return handling on a low-ticket appliance can wipe out the profit on the unit several times over - and the listing rating pays for it publicly.
Supply that could not follow FBA
Unstable delivery dates made it impossible to keep the right inventory in Amazon's warehouse: too little meant lost rank, too much meant storage fees.
03What we changed
Motor re-specified for Japanese mains
Winding, rotor and internal components set for 100 V operation, so continuous running stays stable instead of overheating on long cycles.
Aging and pressure test per batch
Multi-round aging plus pressure durability inspection before shipment, with results filed by batch number.
Private-label ready for Amazon
Logo, colour box and packaging produced for retail listing, not generic export cartons that arrive looking unbranded.
Production aligned to FBA cycles
Batch sizes planned against the seller's replenishment rhythm, so restocking follows the sales curve rather than a fixed calendar.
04Results
Top 3 in category - the listing now holds a Top 3 position on Amazon Japan for both sales volume and customer rating.
Monthly sales up more than 3x - growth came within a short period and has held a stable upward trend since.
Complaint and return rate down sharply - after-sales cost fell with it, restoring margin on every unit sold.
Repeat orders as a standing account - the seller now orders on a fixed cycle, citing product stability and delivery reliability.
Selling into Japan is not an export label question. Mains voltage, duty cycle, packaging and FBA timing all have to be built in before the container leaves. Send us your marketplace, voltage and monthly volume - we will quote a specification and a replenishment schedule that fits it.
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