Tokyo, Japan. 8th July, 2015. Japan's stocks sink below the psychologically important 20,000 mark on Wednesday, July 8, 2015, on the Tokyo Stock Exchange market to a seven-week low on concerns about a meltdown in Chinese shares and the Greece debt crisis.The 225-issue Nikkei Stock Average fell to as low as 19,737.64, its lowest level since May 18. Credit:  Natsuki Sakai/AFLO/Alamy Live News Stock Photo