TOKYO— Nintendo Co. plans to pick up the production pace for its hit Switch game console next year, people with direct knowledge of the matter said, showing the company’s deepening confidence in the success of the device.

The Kyoto-based company is sketching out a plan to make 25 million to 30 million units of the Switch in its next fiscal year, which begins April 2018, and has begun informing business partners about it, the people said. They said the plan is still in its early stages and Nintendo could aim higher depending on sales during this year’s holiday season.

The Switch went on sale globally on March 3, 2017. Between that date and Sept. 30, Nintendo said it sold 7.63 million units. The company said at its quarterly earnings announcement in October that it planned to sell an additional 9.1 million units by March 2018, meaning total sales by that date would reach nearly 17 million.

Expectations for the Switch were low ahead of the launch because of its $300 price and what analysts saw as the product’s uneasy positioning between smartphones, which are more portable, and rival game machines such as Sony Corp. ’s PlayStation 4, which are more powerful.

However, consumers have been drawn to the product’s hybrid nature—it can be used both as a living-room console and as a portable hand-held machine. A Nintendo survey of Switch owners found they viewed the device more as a hand-held than a console, opening room for it to become a one-per-person item rather than one-per-household. Suppliers said an AC adapter is one of the best-selling Switch accessories, suggesting people are using it in their bedrooms.