This was a weird little trend in Japanese videogame music.
Secret of Evermore’s ('93) theme for the Dark Lich is the first time I know of it being employed.
The most explicit usage of it probably comes from Power Instinct 2 ('94), composed by Toshikazu Tanaka.
Another fighting game, The King of Fighters '97 ('97, duh), makes pretty abrupt use of chant samples.
You can hear it in a track Hitoshi Sakimoto wrote for Kingdom Grand Prix ('94). Sakimoto used a similar vocal effect for parts of his Vagrant Story soundtrack ('00).
I’ll probably find a few more examples later.
A lot of Japanese videogame composers had exposure to YMO’s music, so it’s plausible that they also first came across Kecak chants while listening to YMO’s 1981 album Technodelic.