The short answer
Separate Japan–Korea market-entry costs into seven budgets: paid diagnostic, partner, media, localization and production, compliance and specialists, logistics or patient operations, and internal owners plus support. Set the ceiling from contribution after returns or cancellations, not an industry-average ad budget.
Do not set Japan–Korea market-entry costs from an industry-average media budget. Approve seven separate budgets: paid diagnostic, partner fees, media, localization and production, compliance and specialists, logistics-inventory-returns or patient operations, and internal owners plus local-language customer support.
Cross-border selling, a distributor, a branch, and a local company have different cost structures. JETRO and Invest KOREA document different setup steps and obligations by entry form. Do not apply a local-company model to a marketplace test, or omit incorporation, office, tax, and people costs when the chosen operating model requires them.
For products, record import declarations, duties and taxes, permits, cross-border and local shipping, warehousing, inventory, and returns. For medical beauty, replace fulfilment costs with local-language inquiry, consultation, booking, interpretation, cancellation, payment, and aftercare operations. Client-designated specialists make final regulatory, tax, and medical decisions.
Use Keyword Planner forecasts with the actual account, geography, period, and conversion definition to frame media scenarios, not guarantees. Set the acquisition and maximum-loss ceiling from contribution after discounts, platform and payment fees, duties, logistics, returns or cancellations, and local support.
A RIVACTA Fit Call is a 30-minute pre-contract mutual fit check with no research, diagnosis, strategy, or deliverable. Work begins after a paid 2–4 week Market Diagnostic agreement at ¥300K–¥500K; Managed Engagement is ¥800K–¥1.5M per month. Media, production, specialists, and operating dependencies remain separate, and the diagnostic concludes Go, Conditional Go, or No-Go.