http://www.riaj.or.jp/data/others/chart/w150220.html
Of course!
And kana is a good example for an artist that grew popular after 2003 and she sold digitally better than physically especially in singles (even though her 2nd original album sold around 750,000).
Even kuu sold better digitally especially in singles (but she were at a time were singles still sold physically better in general).
AKB48 succeeds both physically and digitally but their physical success is based on 200,000-400,000 people buying multiple versions constantly for years of their singles because of live events, meetings, lives tickets etc.