BC UMa early superhumps Dear Colleagues, The analysis of the Kyoto run of BC UMa on Apr. 1 has revealed the presence of clear low-amplitude superhumps (0.05-0.07 mag), which are clearly one of demonstration of "early superhumps". The best period has been determined as 0.0600 d, which is about 3 percent shorter than Iida's superhump period (1994). The present extremele rare outburst of BC UMa is now photometrically confirmed as a superoutburst. We hope we can later provide more information on the progress of the subsequent observations and analysis. Regards, Taichi Kato, Makoto Uemura, Gianluca Masi on behalf of the VSNET collaboration team