制度|せいどseido[1]atamadaka (head-high)

1. nounsystem; institution; organization; organisation
   新制度しんせいどは成功せいこうだと分わかった。↗

   The new system proved a success.

• SynonymシステムNeutralA loanword covering any system made up of interacting elements, such as a computer system; 「制度」 is limited to rule systems established by society.
• Related仕組みしくみNeutralRefers to the structure or mechanism behind how something works, as in 「機械の仕組み」; not necessarily socially established, while 「制度」 is a legal or conventional framework.

Use 「制度」 for rule systems established by society, such as legal or conventional frameworks. For how something works or its underlying mechanism, say 「仕組み」; for technical systems or systems in general, 「システム」 is the choice.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 社会的しゃかいてきに決きめられた仕組しくみやきまり。システム。