Earlier today, Morning Musume's Takahashi Ai gave an announcement to everyone on her blog.
“We, Morning Musume, will begin our spring tour on 4/3 at Oomiya Sonic City.
Right now, everyone is focusing on helping the victims and restoration from the “Great Tohoku Earthquake”.
We, Morning Musume, have also been thinking about what we can do to help even just the littlest bit.
After a discussion with the members, we have decided to hold fundraising activities in the lobby of the venue for as long as time allows.
We would be so grateful to everyone who contributes even a little bit at tomorrow’s venue whether you’re coming or going.
Source: Takahashi Ai's Official Blog