Ishikawa Kokoro was an NMB48 Kenkyuusei.
2nd Senbatsu Janken Taikai - 24th Single3rd Senbatsu Janken Taikai - 29th Single4th Senbatsu Janken Taikai - 34th Single5th Senbatsu Janken Taikai - Solo Debut + 38th Single
AKB48 Group Draft Meeting 2013AKB48 Group Draft Meeting 2015