Masato Kato (加藤 正人, Katō Masato, born March 28, 1963) is a Japanese video game artist, scenario writer and director. In the early days of his career, he was credited under the pseudonyms of "Runmaru" and "Runmal". He then joined Square, and was most famous for penning the script of Chrono Trigger (based on a story draft by Yuji Horii), as well as Radical Dreamers, Xenogears, Chrono Cross, Final Fantasy XI and parts of Final Fantasy VII.