They were. The production of the movie itself was actually pretty amazing. They got a lot of people who were fairly new to the industry and they did a hell of a job, lots of them ended up becoming recognized names later as well.
If you actually have the remastered DVD (You can but it for about $10, pretty good quality over all especially considering it's CPM) I highly recomend watching it with the commentary on. Moriyama gives interesting information throughout the entire thing, name drops a shitload of people who became big later and genuinely sounds like he enjoys talking about the movie.
He honestly sounds like they could have restarted the movie at the end of it and he could have gone another round with the info and anecdotes.