A rickshaw puller seeks passengers outside Senso-ji Temple in Tokyo, Japan, April 20, 2011. The plunge in the number of foreign tourists to Japan following a string of natural calamities and a nuclear crisis has put the key industry in a tough situation, particularly with crucial Asian markets, its tourism agency head said on Wednesday. The number of foreign visitors fell by half in March compared with that of last year. [Xinhua/Ji Chunpeng]