The Bury-based group said the "considerable support and goodwill" shown by customers meant it no longer intended to ditch the brand in favour of using the Blacks name for all its outdoor clothing stores.
The estate racked up losses of £14.9 million after an "exceptionally difficult" year but JD Sports said it is confident a new management team and updated ranges will reduce the figure this year.
Despite strong trading in its sports stores, JD's overall profits were 18% lower at £55.1 million in the year to February 2, including losses of £500,000 from its division housing fashion brands Bank and Scotts.
JD has admitted the challenge of reviving the Blacks business, which it bought out of administration for £20 million in January 2012, has been tougher than expected.
It has closed 122 outdoor stores in the last year as it looks to eliminate a high rent bill, resulting in a portfolio of 174 stores. This will be reduced further to around 140 outlets, ten more than JD originally planned.
It added: "The Blacks stores will primarily stock more technical products from the premium brands at higher price points with Millets catering for a more casual outdoor customer."