TOKYO—Nintendo Co. is scheduled to announce its second-quarter earnings after the Japanese market closes on Oct. 26. Here’s what you need to know:

EARNINGS FORECAST: The Kyoto-based company is expected to report a net profit of 18.5 billion yen ($178.5 million) and an operating profit of ¥3.2 billion yen, according to a median forecast of six analysts polled by data provider Quick. In the year-earlier quarter, Nintendo reported a profit of ¥3.2 billion and operating profit of ¥7.8 billion.

REVENUE...