Berlusconi 'clashes' with judiciary 'have slowed reform'
Speeding trials, easing jail overcrowding 'urgently needed'24 January, 12:38
"The political and institutional clash that has been going on for some time has contributed to slowing the reforming process the country urgently needs," Cancellieri said at a ceremony marking the start of Italy's judicial year.
Berlusconi, ejected from parliament last year on a tax-fraud ban he claims was improperly applied, has faced around 20 trials since entering politics in 1994.
Last August's tax-fraud sentence was his first binding conviction.
He and his revived Forza Italia (FI) party have continued protesting inside and outside parliament against allegedly left-wing magistrates out to get the three-time premier.
His other legal woes include a first-instance conviction for sex with an underage prostitute and he faces a trial for allegedly bribing a Senator to switch sides.
On Thursday FI erupted in fury once more when Berlusconi was placed under investigation for alleged witness-tampering in a trial of three associates found guilty of pimping for him.
Judicial reform is one of the items on the agenda of Premier Enrico Letta's revamped left-right government.
Letta aims to speed up a system that frightens foreign firms from investing in Italy and take measures to cut overcrowding in Italy's jails, which are bursting at the seams amid a wave of suicides.