Just Bento

Hello everybody

Well, this is my first post in this forum and I hope you can help me out with a tiny little problem...

I read about the yatsuhashi, which I have longed for ever since my holiday in Japan, so I wanted to try it out myself and went out to buy rice flour.
But the problem is now, that I bought unsweetened rice flour...
Now my question:
Is it even possible to make yatsuhashi without sweet rice flour / can I add a sweetener like sugar ?

Thanks in advance.

Andy