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石黒堂株式会社

Agency Headquarters

川崎市高津区久本3丁目3番16　 バースシティ 溝の口 シエル1503号, 神奈川県, 213-0011

Ishiguro-do Co., Ltd. (石黒堂株式会社) is a premier, results-oriented digital marketing agency specializing in high-performance growth strategies and advanced search engine marketing. As a certified Google Partner, the firm maintains a verified track record of managing complex advertising portfolios and delivering consistent, measurable ROI for a diverse clientele ranging from ambitious startups to established enterprises. Our core expertise lies in the sophisticated orchestration of the Google Ads ecosystem. Leveraging our status as a Google Partner, we provide clients with a competitive edge through early access to beta features, advanced product insights, and direct technical support from Google. We specialize in the full spectrum of paid media, including Search, Display, YouTube (Video), and Shopping campaigns, ensuring that brands capture high-intent traffic at every stage of the customer journey. The Ishiguro-do methodology is rooted in data integrity and technical precision. We go beyond mere ad placement, focusing on comprehensive conversion rate optimization (CRO) and the seamless integration of Google Analytics 4 (GA4) and Google Tag Manager. By utilizing machine learning-driven bidding strategies and rigorous A/B testing, we continuously refine campaign performance to maximize Return on Ad Spend (ROAS) and lower Customer Acquisition Costs (CAC). At Ishiguro-do Co., Ltd., we view digital marketing as a transparent, evolving science. Our team of certified specialists is dedicated to navigating the complexities of the digital landscape, transforming raw data into actionable business intelligence. We empower our partners to scale with confidence, providing the strategic oversight and executional excellence required to dominate their respective markets in an increasingly digital-first world.

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