Zenken, a Japanese company in web marketing and overseas HR, is seeing big wins with ChatGPT Enterprise. They’ve rolled it out across the organization, achieving over 90% weekly active usage. The AI cuts time on research, summarization, and translation by 30-50%, freeing up 5 to 15 hours per employee each month for higher-value work. Sales teams now prepare faster for client meetings, leading to more conversations and better win rates. The shift from manual processes to AI has also saved 50 million yen in outsourcing costs. Zenken chose ChatGPT Enterprise for its security—no data training on their confidential info—and its reasoning models, which help with complex strategic analysis. Yuji Okada notes the AI supports management decisions in market analysis and competitive strategy. Why it matters: This case shows how lean sales teams can scale impact by offloading prep work to AI, a model other resource-strapped companies could follow.