The group said the rise reflected a first full week of trading for a new store in Leicester and strong performances from the flagship store on London's Oxford Street and the online operation.
However, only four other stores recorded a positive sales performance.
Nick Bubb, retail analyst at Pali International, said on a like-for-like basis, which strips out the impact of new space, the sales increase was about 2 percent.
Department store sales in the week to September 13th increased to £51.4 million. John Lewis described the performance as "exceptional in the current economic climate" and looked forward to future success.
Dan Knowles, a director of selling operations at John Lewis said in a statement: “Branches have now started toys expansions, and Halloween merchandise is out on the shopfloor – a clear indication of seasonal change. We have started the second half strongly in terms of sales so far. There's all to play for.”
Total John Lewis Partnership sales increased 3.3 percent to 123.8 million pounds.