The short answer
In high-CPC categories, start narrow on the highest-intent queries, protect budget with decision rules, and tie spend to contribution margin.
In Japan and Korea, the most commercially attractive categories—medical beauty, cosmetics, and competitive consumer goods—are also the most expensive to advertise in. High demand and high lifetime value pull cost-per-click upward.
When clicks are expensive, small inefficiencies are costly. Broad targeting, weak landing pages, and unmeasured conversions waste premium budget faster in these categories than in low-CPC ones.
Start narrow and intent-led. Concentrate early budget on the highest-intent queries and best-converting placements, prove the conversion path, then widen—rather than buying broad reach before the funnel is proven.
Protect the budget with explicit decision rules: a test period, a maximum loss, an evidence threshold, and a named owner who approves reallocations. In high-CPC categories, discipline matters more than bid aggression.
Tie budget to contribution margin, not last-click volume. A booked clinic consultation or a profitable repeat marketplace order—not raw clicks—should govern how much you are willing to pay per result.