Pursuant to the Prison Act, which specified that
it was desirable to provide each inmate with one cell, the Abashiri Branch of Hokkaido Prison
had 16 chambers for solitary confinement. In 1912, when the Abashiri Branch was reconstructed
after a fire, there were 34 chambers for solitary confinement. After the prison began to focus
on penal practices aimed at rehabilitating inmates, the use of solitary chambers decreased
because shared cells were important for inmates to develop social skills and because the
management of solitary chambers was time-consuming. The solitary confinement chamber at
Abashiri Prison Museum was recreated with reference to records. It is a tile-roofed wooden hut
with one earthen-floored room and one wooden-floored room that's the size of two tatami
mats. Sunlight comes in only from the doorway and the fanlight.