This analyzes the business strategy of Yamazaki Shop Daita Sankatsu, a small convenience store operating in a residential area, which successfully competes against large chain stores by employing a "strategy for the disadvantaged" based on the principles of Lanchester Strategy.

This approach involves avoiding direct competition with major players by focusing on niche markets (local battles), concentrating resources (single-point concentration) on unique offerings like craft beer and personal customer relationships, and establishing an exclusive position (one-on-one combat).

The store utilizes close-quarters combat through genuine, highly personal interactions—such as the owner's mother greeting customers with "Welcome home"—and implements guerrilla tactics like unique events and labor-intensive services that large chains cannot easily replicate, ultimately aiming to be strongly favored by just thirty percent of potential customers rather than trying to appeal to everyone.