Japan's Nikkei Stock Average tumbled on Friday after China reported it's official manufacturing activity index fell to 50.4 instead of expected smaller drop to 52.1. Moreover Yen kept appreciating against Euro, damping export stocks. Nikkei 225 lost 1.20% or 102.48 points and finished at 8,440.25. Sony Corp, which is heavily dependent on market situation in China and US, fell 3.5%. Aozora Bank sank 5.4% after announcing plans about repayment of public funds won't be revealed during its June shareholder meeting.