Recap of our performance

30% increase in Amazon Revenue

Yamazen saw a 30% increase in ad-driven sales within two months of using Shirofune, thanks to automated bid adjustments and budget optimization that allowed for timely, data-driven responses to demand changes.

18％ Increase in ROAS

Yamazen Corporation achieved an 18% improvement in ROAS within two months using Shirofune. The tool’s automation capabilities enabled precise budget allocation and bid adjustments, maximizing ad efficiency and boosting returns.

Challenge

Yamazen Corporation, a specialized trading company with over 10,000 products listed on Amazon, faced challenges in managing its extensive product lineup efficiently.

The complexity of Amazon's advertising interface and limited automation features hindered optimization efforts, making it difficult to achieve desirable ad performance.

The team also struggled to allocate sufficient resources for ad management, resulting in a less-than-optimal return on ad spend (ROAS).

Approach

To overcome these challenges, Yamazen decided to implement Shirofune, an automated advertising management tool.

The decision was influenced by positive feedback from other departments and the opportunity to try the tool during a trial period.

Shirofune’s automation capabilities allowed for efficient bid adjustments and budget management across a large volume of campaigns. Additionally, the tool provided daily email reports, enabling quick responses to fluctuations in demand and data-driven decisions.

Results

With Shirofune in place, Yamazen achieved a 1.3-fold increase in sales through advertising and an 18% improvement in ROAS within just two months.

Shirofune’s automated bid adjustments and budget management expanded campaign optimization capabilities.

The daily reporting allowed for timely budget adjustments aligned with real-time demand, significantly boosting the efficiency and effectiveness of Yamazen's Amazon advertising operations.

Direct Agents - Case Study

Direct Agents, a U.S.-based digital marketing agency, faced challenges with manual ad management tasks, especially with Amazon Ads, limiting their ability to focus on strategic initiatives. After integrating Shirofune’s automation, they reduced ad management time by up to 63%, freeing up resources for high-value tasks like audience segmentation and creative testing. The E-Commerce team saw a significant drop in workload from 125 hours to 45.8 hours per account. This automation led to impressive results, including a 75% increase in MQLs with only a 14% rise in ad spend. Direct Agents continues to expand Shirofune’s use across platforms, optimizing omni-channel marketing and driving long-term client success.

Zilker Partners - Case Study

Zilker Partners, a U.S.-based digital marketing agency, struggled to scale operations after shifting to a generalist model, with staff handling multiple tasks across paid media, SEO, and content. The lack of an integrated platform for real-time optimizations limited campaign effectiveness. By adopting Shirofune, they streamlined campaign management across platforms, enabling generalists to manage ad operations independently. In just one month, they onboarded 24 client accounts and doubled the account capacity per manager from 6 to 12. Automation saved up to 54 hours per month per manager. Zilker Partners now efficiently scales operations, allowing generalists to focus on strategic initiatives while managing high-performing campaigns across platforms.

Carrot-Top - Case Study

Carrot-Top, a patriotic products retailer, struggled with rising customer acquisition costs and inefficient, agency-led ad management. Delayed reports and rigid processes led to wasted spend and missed opportunities across platforms like Google and Meta. After adopting Shirofune’s AI-powered ad automation, Carrot-Top gained real-time budget control and cross-platform optimization. Within weeks, they cut CPA by 40%, improved off-season ROAS from 2.7 to over 5.0, and replaced manual workflows with fast, data-driven decisions. Now, Carrot-Top continues to scale with Shirofune, using AI to fine-tune campaigns and prioritize high-value customers.

Yamazen