AKB48 Team 4's Okawa Rio to temporarily suspend her activities due to knee injuryMay 4, 2015AKB48 Team 4 member Okawa Rio will temporarily suspend her activities due to dislocation of her right kneecap. This announcement was made on May 2nd through the group's official blog. The blog entry featured a picture of her medical certificate which clearly states her condition. It will require about 4 weeks until full recovery. On behalf of Okawa, the staff wrote to fans, "We apologize for causing worries and troubles."Source: natalie