Sachiko covers antitrust, mergers and acquisitions, privacy and data security, as well as patent disputes related to connected cars. She has an undergraduate degree from Waseda University in Tokyo and a master's degree in communications from United States International (now Alliant International) University in California. She previously worked as a journalist for Time magazine, the Far Eastern Economic Review, Bloomberg News, and the Washington Post in Japan.

Toko is a senior correspondent in Tokyo covering antitrust, anti-bribery & corruption, financial services and regulatory issues in Japan. Before joining MLex, she has worked as a journalist for The Wall Street Journal, Dow Jones News, Bloomberg News and Time Magazine.