He also states in the report that prisoners continue to be monitored by CCTV, which he says needs to change.
"Last year, my inspectors observed footage of a prisoner being assaulted by two prisoners in the high security yard.
"Although CCTV coverage was comprehensive, access to emergency call points within the yard was limited and the victim was unable to call for assistance.
"After the fights at Mount Eden in 2016, the Department of Corrections' own Chief Inspector called for more active supervision of prisoners.
"Two years on, I am concerned that the safety of prisoners in the exercise yard continues to be solely monitored by CCTV."
Boshier was also still concerned about conditions for remand prisoners - people accused, but not convicted, of a crime.
"In the past five years, the prison has made little progress in providing remand prisoners with more time out of their cells and constructive activities.
"This is despite recommendations from both a visiting United Nations subcommittee and me over this period."
Questions also came up about the use of force by guards and Hawke's Bay Regional Prison told Boshier the process will be reviewed.
"Since my last inspection, three prisoners have died in the prison.
"One of these deaths occurred in March 2017 following staff using force to restrain the prisoner.
"I had called for the use of force at the prison to be reviewed after my last inspection, and I do so again."
Boshier said his inspectors were encouraged to note a generally positive atmosphere with marked improvement in the high security units.
At the time of their visit, there was a reduction in the number of violent cases as a percentage of total monthly incidents, Boshier said.
"The prison has achieved or partly achieved 20 of the 37 recommendations I made in 2016 and should be commended for the distance travelled so far.
"I am encouraged that Corrections has now accepted three-quarters of my latest recommendations, and I look forward to seeing prisoners' conditions and treatment further improved when I next inspect the prison."