2005 - play online Yuuji Horii Interview

As taken from here:

Chrono Trigger is a legendary game among American RPG fans. What exactly was your role in that title?

In Chrono Trigger, Hironobu Sakaguchi and I were involved together as supervisors. Mainly I worked on the story’s plot. I wrote Chrono Trigger with a vision of time travel. A character would travel to the past, make some actions, and that would change the current or future situation of the character…. As a side note, I am a huge time travel fan. An old TV series, Time Tunnel was my favorite and I never missed an episode.

From: Interviews