What EC THUNDER does

Five parts of running an Amazon Japan business, connected so each one knows what the others know.

Restock planning

Restock for profit, not just volume.

Amazon's restock recommendation is built to keep you in stock, from your sales history. But Amazon can't see what you actually pay your suppliers, your payment terms or the cash you have. EC THUNDER plans with all of it, so the same budget goes first to the products that leave the most profit. Amazon's recommendation is costed the same way and kept beside it, so you can compare and adjust either one at any time.

Competitors & pricing

See exactly where you stand against every rival.

Price against sales rank on one map. Rivals that are cheaper and selling better land in the red zone. Prices are compared per unit of your pack size, and every rival shows what you'd keep if you matched it.

Prep & FBA shipments

From restock plan to FBA shipment, without opening Seller Central.

Draft the purchase order from the plan. When the goods arrive, the prep sheet tells the bench what to build and prints FNSKU and recipe labels. Tick what to send and create the shipment: EC THUNDER runs Amazon's free steps and stops only where money is spent.

Books & analytics

Amazon payouts, straight into your books.

Each Amazon payout is split into sales, fees, advertising and refunds, booked automatically, and checked against the money that actually reached your bank. Consumption tax is kept apart from sales. When sales go up or down, you can see whether visitors, the share who buy, or price caused it.

AI assistant

Rules do the math. AI explains it.

An assistant follows you through every page of the app. It already knows which product or screen you're on and reads the data it needs by itself, then gives you analysis and advice with its sources cited.

Context, automatically: Open it on a product and it has that product's sales, stock, margins and competitors loaded.
One click or any question: Pick a suggested question for the page you're on, or ask anything in your own words.
The model you trust: Choose between Claude and GPT models for each question, from fast to most capable.
Advice, never actions: Figures come from your data and fixed formulas. The AI can't change Amazon, your prices or your books.

See it on your own Amazon data.

Tell us about your Amazon Japan business and we'll set up an early-access account.

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