Fast Retailing Co. reported a 64 percent spike in quarterly profit after selling more Uniqlo casual wear than expected in Japan and overseas, while the weakening yen further boosted returns.

Net income rose to ¥68.8 billion in its fiscal first quarter ended in November, compared with ¥41.9 billion a year earlier, Asia's largest clothing retailer said Thursday.

This compares with the ¥48.4 billion average estimate from four analysts compiled by Bloomberg. Sales rose 23 percent to ¥479.5 billion.