Retail sales at value clothing chain Uniqlo’s Japanese stores recorded a double-digit increase in March, boosted by comparisons with the aftermath of last year’s earthquake and tsunami.

Uniqlo’s own store sales were up 14.9%, or 16.9% including online sales, with the 37 stores unable to trade for a week or more following the disaster recording strong revenue increases.

Meanwhile, same store sales, which exclude the 37 earthquake-affected shops, were up 5.1%.

Uniqlo said the same store sales increase was helped by advertising campaigns for Color Ankle Skinny Pants, Bra Tops and UT Print T-shirts.