Japan Stock of the Day | Kabutaro & Friends

On August 12, 2026, the most talked-about Japanese stock online was Seiko Giken <6834>.
Background: The company, which manufactures optical communication components and inspection equipment, released its Q1 FY2027 (April-June) earnings after the close of trading on August 10. Revenue rose 50.6% year-on-year to 30.087 billion yen and operating profit surged 174.5% to 7.733 billion yen, a sharp increase across the board. Alongside the results, the company raised its full-year ordinary profit forecast by 44%, further extending its record-high earnings projection, and increased its dividend by 6 yen. Rapidly expanding demand for optical communication components for data centers drove the outperformance, with the company achieving its medium-term management plan targets a full year ahead of schedule.
On August 12, the stock hit its daily price limit in Tokyo trading and was featured as a top stock pick across financial media. The Nikkei 225 rose 553 points to 67,523, and the TOPIX set a new all-time closing high. Amid broad buying in AI, semiconductor, and banking stocks, Seiko Giken drew particular attention as a direct beneficiary of AI-driven data center infrastructure demand, generating significant discussion on social media.