The danka system (檀家制度, danka seido) was a historical government system in Japan where households would be required to register with Buddhist Temples. ^[1] This effectively put a lot of the work of administration on the temples rather than the government.

It was used to persecute Christians.^[2]

In the Meiji Restoration it was replaced with Shrine Parishioner Registration.

• Freedom of religion
• Shrine Parishioner Registration