According to CuSO4:
> 
> > > > in an anime the other day, but the credits listed a "Matsumoto <single
> > > > kanji>" instead of the two kanji she used before...
> > > > Anyone know more?
> > > Which Anime ????
> > Ganbarist! Shun.
> 
> I do not have the anime handy.  By just looking at the seiyuu list of
> Ganbarist ! Shun in the anime magazines only the usual 2-kanji for Rika
> is found.

I just caught episode 9 of Shibuya de Chu with Rica, and there her name
was spelt the usual way, too, but at the end of the final episode of
Shun, it was a single kanji... Strange... I'll re-check it later
tonight.