Zenken boosts a lean sales team with ChatGPT Enterprise

Zenken combines GPT‑5, custom GPTs, image generation, and the latest OpenAI models and tools to accelerate both of its core businesses: web marketing and the fast growing overseas human resources business. As one of the first companies in Japan to roll out ChatGPT Enterprise across the organization, Zenken is putting an AI first approach into practice and seeing clear business impact.

Today Zenken reports:

• More than 90% weekly active usage of ChatGPT Enterprise

• Average time savings of 30 to 50% across knowledge work tasks

• 5 to 15 additional hours per employee every month, reinvested in higher value work

• 50 million yen in annual outsourcing cost savings compared with the previous year

Deciding to adopt ChatGPT Enterprise that meets twelve critical requirements

Before adopting ChatGPT Enterprise, Zenken relied on manual processes for a wide range of knowledge tasks. Employees spent large amounts of time on research, summarization, translation, and content creation. Sales teams also faced long preparation times for client meetings, which reduced the number and quality of customer conversations.

To address these issues, Zenken decided to introduce AI in a structured and secure way. Yuji Okada, Manager of the Corporate Planning Department in the Administration Division, explains that when they evaluated potential solutions, they “focused on twelve capabilities required for our business, such as security and advanced support for complex thinking,” and recalls that “ChatGPT Enterprise was the only solution to meet all of these conditions.” He notes, "Because we deal with client and sensitive internal information, preventing data leaks is non-negotiable. ChatGPT Enterprise guarantees that our data won’t be used to train its AI. This security feature gave us the confidence to safely handle confidential data."

Transforming sales activities with AI supported workflows

As a result, Zenken has seen clear gains in sales performance: