"It was right and proper that the coaches considered captaincy at the same time as we were looking at selection of our squad for the England game,"said Johnson.
"We believe Kelly has the qualities we're looking for to captain Scotland.
"Captaincy is about deed in my book, not Churchillian oratory, and the knowledge and experience that Kelly brings to the Test match arena is good for this team.
"We are also looking at our leadership group and I'll be naming two vice-captains in the team that we announce tomorrow."
Brown had initially been selected as captain by Andy Robinson for last season's Championship but missed the tournament due to injury.
But after getting a taste of the captaincy during the Autumn, Brown is relishing continuing in the role.
"As I said back in November, it's a huge honour to captain Scotland," said Brown.
"The job now, though, is to work with all the other players in the squad to deliver a performance to make the country proud this weekend.
"It's a while since I've played against England. I missed out through injury in last year's Six Nations and I was sidelined during the Rugby World Cup match in Auckland as well, so I'm really raring to go,"
Johnson has also cut his initial 35-man training squad to 27-man party ahead of Saturday's Calcutta Cup clash.
Revised Scotland squad:
Forwards: Johnnie Beattie (Montpellier), Kelly Brown (Saracens), Geoff Cross, David Denton, Ross Ford, Grant Gilchrist (all Edinburgh), Ryan Grant (Glasgow Warriors), Richie Gray (Sale Sharks), Dougie Hall (Glasgow Warriors), Jim Hamilton (Gloucester), Robert Harley, Alastair Kellock, Moray Low, Pat MacArthur (all Glasgow Warriors), Euan Murray (Worcester Warriors) and Alasdair Strokosoch (Perpignan)
Backs: Max Evans (Castres), Stuart Hogg, Peter Horne, Ruaridh Jackson (all Glasgow Warriors), Greig Laidlaw (Edinburgh Rugby), Sean Lamont, Sean Maitland, Peter Murchie, Henry Pyrgos (all Glasgow Warriors), Matt Scott and Tim Visser (both Edinburgh Rugby)