Was Akira Toriyama involved in the story writing of Broli?

[OWmyDragonBallz]

Was Takao Koyama the only writer of the first Broli movie or did Toriyama help him? I read that when it came to the movies, that Toriyama was only an audience member aside from some character designs, but was that it?

UPDATE : I didn't realize that there was a thread already discussing this. My mistake, haha.

[Freeza Soldier #156]

A lot of Broli threads lately. No, Toriyama had nothing to do with writing Broli's story. The only involvement that Toriyama had was some minor character designing.

[Herms]

Freeza Soldier has already covered it, but just to be extra thorough, here's Toriyama explaining his involvement with the movies in his Daizenshuu 6 interview (this is from back in 1995, so obviously it doesn't cover the recent spat of new movies):

What is your personal stance on Dragon Ball’s theatrical films, Sensei?
I take the movies as “stories in a different dimension from the main story of the comic”. I’m entirely just an audience member for them.

What work do you do on the films, Sensei?
I check the plot and script that gets sent to me from Toei Animation. I also do some character designs and touch-ups, as well as altering the names and such.

Are there any characters you personally designed, Sensei?
There are. Bojack and Broli, for instance. Recently I’ve done Tapion and Minoshia.

How do you go about coming up with the characters?
Toei shows me the project draft for each movie, and I design characters appropriate to the story.

You can check out Toriyama's design sketches for Broli over on Kanzenshuu's Production Guide.

Also of interest is Takao Koyama's blog post recounting his experience seeing BoG. He notes how odd it felt since it "was my first experience watching from the audience a Dragon Ball Z theatrical feature that I hadn’t handled the script for myself", and explains a bit about his process writing the old DBZ movies:

In handling the scripts for the films, what I always worried about each time was the problem of what to do about the opponent Goku fights against. That’s because, at the very least, they had to be stronger than [the ones from] the previous movie.

After much hard work, I was unable to come up with an opponent stronger than Broli, and fell into a rut where I made him appear three times.