AI Document Review Tool for Law Firms: Yamamoto Law Firm Success Story

Key Takeaways at a Glance

• Client: Yamamoto Caliboso, a Honolulu law firm specializing in regulatory matters before the Hawaii Public Utilities Commission.
• Problem: A legal admin manually reviewed and summarized 30–100 PUC filings per month, drafting 2–3 sentence summaries by hand and circulating them to the firm.
• Solution: An Endsight-built workflow combining Power Automate, AI Builder, and ChatGPT. It monitors the firm’s external filings inbox, retrieves each document, generates a structured summary, and drops a formatted Word doc into NetDocuments. The whole thing runs on a schedule. No human triage required.
• Result: Daily filing reviews shifted from a manual, hours-long task to an automated workflow the legal admin oversees in minutes.
• Why ChatGPT was the right fit: The firm already owned ChatGPT licensing, and PUC filings are public record, so internal-data restrictions weren’t a factor.
• Bigger lesson: Mid-size law firms can run real AI workflows on tools they already pay for. No new platform required.

Overview

Craig Hashimoto, Executive Director at Yamamoto Law Firm, recognized an opportunity to modernize how the firm handles regulatory filings. Understanding the time-consuming nature of manually summarizing Public Utility Commission (PUC) filings, he led the charge in integrating AI-powered automation to streamline the process.

By implementing an AI-driven summarization tool, Yamamoto transformed how legal filings are processed—ensuring faster, more accurate insights while reinforcing the firm’s reputation as a forward-thinking leader in the legal industry.

This initiative not only increased efficiency but also set a new standard for innovation in legal operations, positioning Yamamoto as a firm that embraces cutting-edge technology to better serve its clients and get the most out of their talented staff. 

Challenges

The manual process of summarizing PUC filings was both time-consuming and labor-intensive. Jesi, a paralegal at Yamamoto Law Firm, was responsible for reviewing each document, extracting key information, formatting the summary in a templated Word document, uploading it to NetDocuments, and distributing it via email. With 30 to 100 filings per month, this repetitive process placed a significant burden on her time, especially when managing diverse document types and navigating the limitations of existing AI Builder tools.

Objectives

The primary goal was to automate the document summarization process, reducing manual effort while improving accuracy and accelerating the flow of information within the firm. Additionally, the initiative aimed to empower Jesi, by providing her with a deeper understanding of the automation and AI tools. This knowledge enabled her to oversee the system effectively and continuously refine the AI model based on real-world results and evolving business needs.

Solution Implemented

To address these challenges, Endsight implemented an AI-driven automation system using AI Builder within a Power Automate workflow, seamlessly integrated with a ChatGPT connector. This solution streamlined the summarization process, reducing manual effort while ensuring accuracy and consistency.

1. Mailbox Monitoring: The system scans the designated Gmail account for new filings every 24 hours.
2. Document Retrieval: Extracts and temporarily stores documents from email links in OneDrive.
3. Content Summarization: Utilizes ChatGPT to scrape and summarize the text based on predefined criteria.
4. Document Formatting: Automatically formats the summary in a Word document according to Yamamoto's template.
5. Review and Distribution: Summaries are reviewed by Jesi before being saved to NetDocuments and emailed to the firm.

This AI-powered workflow eliminated tedious manual tasks, allowing Jesi to focus on higher-value work while ensuring timely and accurate information distribution across the firm.

Implementation Process

The transition from manual to AI-powered summarization was carefully designed to ensure a seamless and efficient rollout. The implementation process involved several key steps:

1. Initial Setup:

   • Gmail Integration – The system was configured to monitor the designated Gmail account for new PUC filings. Filters were set up to identify relevant emails while maintaining secure access.
   • OneDrive Storage – A temporary storage solution in OneDrive was established to hold extracted documents, ensuring smooth accessibility for processing.
     
     

2. Automation Workflow:

   • Power Automate Routine – A Power Automate workflow was developed to trigger the automation process on a scheduled basis. It systematically checks the Gmail account, downloads new filings, and stores them in OneDrive.
   • AI Builder Integration – AI Builder was configured to analyze document content, extracting key details and summarizing information based on predefined criteria.
     
     

3. Text Summarization:

   • ChatGPT Connector – A ChatGPT connector was integrated to enhance the summarization process, extracting key points and generating concise summaries tailored to Yamamoto’s needs.
   • Dynamic Formatting – The system automatically structures the summaries into a preformatted Word document template, maintaining consistency and professionalism in the final output.
   
   4. Review and Distribution:

• • Manual Review Step – Jesi reviews the AI-generated summaries before final distribution, ensuring accuracy and refinement.
  • NetDocuments Integration – The reviewed summaries are automatically uploaded to NetDocuments, streamlining document management.
  • Email Distribution – The summaries are then automatically sent to the firm, ensuring timely and reliable dissemination of critical information.

Endsight implemented this process in under 20 hours, delivering a swift and impactful transition to an automated system.

Results

The implementation of the AI-driven summarization tool has revolutionized how Yamamoto Law Firm processes regulatory filings, delivering significant improvements across the board:

• Increased Efficiency – By automating time-consuming manual tasks, the firm has reclaimed valuable administrative hours, allowing the team to focus on higher-priority work.
• Seamless Scalability – With automation in place, Yamamoto can now handle a growing volume of filings effortlessly, without the need for additional resources.
• Continuous Learning & Improvement – Jesi plays an active role in refining the AI model, ensuring that the system adapts over time to become even more accurate and effective.

By integrating AI into its operations, Yamamoto has positioned itself as a forward-thinking law firm, embracing innovation to drive efficiency and better serve its clients.

Conclusion 

The implementation of AI-driven automation at Yamamoto Law Firm has transformed how regulatory filings are handled, replacing time-consuming manual work with a streamlined, scalable solution. By automating document summarization, the firm has gained greater efficiency, accuracy, and adaptability, ensuring that critical legal information is delivered promptly and reliably.

This initiative not only enhanced internal operations but also positioned Yamamoto as a leader in legal technology adoption—demonstrating a forward-thinking approach that benefits both the firm  and its clients.

Partnering with the right IT provider is key to successfully implementing solutions like this. Your IT team should understand your environment, ensure seamless integration, and support ongoing optimization. If your provider isn’t offering innovative automation solutions, it’s worth questioning whether they’re truly aligned with your firm’s future growth.

Don’t just read about AI, put it to work. Schedule a conversation with Endsight to create a custom AI solution that delivers real results for your organization. See how we support law firms with IT and AI 

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About Yamamoto

Yamamoto is a premier law firm based in Honolulu, Hawaii, specializing in real estate, finance, business, utilities, telecommunications, and energy law. Known for their unwavering commitment to excellence, their team delivers innovative legal solutions with a highly personalized approach. Founded by seasoned attorneys from some of Hawaii’s most respected law firms, Yamamoto was built on the principle of providing exceptional legal counsel with the flexibility and tailored service that clients deserve. As a boutique firm, they understand that legal needs often extend beyond their core practice areas. To ensure comprehensive representation, they have cultivated strong alliances with top law firms and attorneys across Hawaii, the U.S. Mainland, and Asia. These strategic partnerships allow them to seamlessly address specialized matters such as tax law, employment law, intellectual property, and complex litigation—ensuring their clients receive best-in-class legal support at every turn. You can learn more about Yamamoto on their website: https://www.ychawaii.com/.