Amid a succession of personal-information leaks, this article examines Tobila Systems' (4441) system for blocking calls to leaked telephone numbers as scam calls, as well as the current situation in which the potential expansion of secondary damage has been highlighted. It extracts key points of the business structure, including dependence on major contract partners and expansion into the corporate market.
A succession of personal-information leaks involving telephone numbers occurred in 2026, making it a year in which leaks of subscribers' telephone numbers became news. The leaked numbers may continue to return as calls from unknown numbers or seemingly credible SMS messages.
Tobila Systems uses a nuisance-information database that combines scam-call number data provided by the police, users' incoming-call logs and the company's own analysis. It provides a system, offered as an option by mobile carriers, that assesses the risk of an incoming call before it is connected and issues a block or warning.
The company is also expanding this technology into business phones, capturing demand for measures against customer harassment and increasing sales. At the same time, the company has been flagged for its dependence on a small number of business partners for much of its revenue, as well as the risk of lower profit due to competition from operating systems and other technologies and new investment.
Going forward, attention will focus on how much of a tailwind the wave of data leaks provides to earnings, how contract structures and the growth of new businesses affect performance, and the direction of the indicators that should be checked in the company's materials.