I went to yesterday's evening Dream Morning Musume concert at NHK Osaka Hall.
One of the MCs was just Mari and Makoto talking. Makoto first told Mari about some dream she had recently, about being back several years ago and trying to join Mini Moni. I don't know how it happened, but somehow that turned into them talking about Yossy.
My Japanese is no where near perfect, but I understood this much:
Makoto: "Yeah, back when we were first in Pucchi Moni together, I wrote Yoshizawa-san this love letter/confession type letter."
(I think she also said she never gave it to Yossy, but I'm not completely sure.)
Mari: "Oh, I wrote one of those too. Yossy just has this aura, doesn't she?"
Makoto was like
and asked Mari when she wrote it. I couldn't really understand what Mari said, unfortunately. It was right after something about Morning Musume. I'm guessing it's like, right after Yossy joined, but the word didn't sound right. Maybe a concert rip will pop up and someone better at Japanese than I can tell us. I also couldn't tell if Mari actually gave it to Yossy or not.
They did talk about how Yossy was probably watching the monitor back stage, and laughingly asked her if she remembered those times.
But that's right: Both Makoto and Mari have apparently written confession-like letters to Yossy.