Sachiko covers antitrust, anti-bribery & corruption, and privacy & cyber security. 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 reporter in Tokyo covering antitrust, anti-bribery & corruption and regulatory issues. Before joining MLex, she has worked as a journalist for Dow Jones News, Bloomberg News and Time Magazine.