Horiemon AI School conducted a blind evaluation by lawyers to compare the legal contract review capabilities of Claude for Legal, ChatGPT, and Gemini. Using a simple prompt, Claude for Legal ranked first with 60 points, producing a detailed 9-page report. ChatGPT followed with 50 points, while Gemini scored 0-30 due to perspective errors and technical hurdles. The results suggest that Claude for Legal has significant potential for practical legal work in Japan when combined with company-specific data and expert oversight.