くいき区域kuiki
1.

A defined area or space that is separated from others, established for a specific purpose or perspective.

2.

A particular region that has been delineated or designated for specific activities or restrictions, such as safety or regulations.

3.

A designated sector within a larger context, often marked by boundaries that dictate what is permitted within it, such as public or restricted access zones.

4.

A specified domain or territory that is distinguished from surrounding areas, often associated with particular uses or administrative functions.

Example:

駐車禁止区域に車を止めてはいけません。

かんりくいき管理区域kanrikuiki
1.

A designated area where entry and activities are regulated for safety or security purposes.

2.

A specific zone where access is restricted to authorized personnel, often for the management of resources or information.

3.

A compartmentalized space established to maintain oversight and control, ensuring that only qualified individuals can enter.

Example:

管理区域 ― 許可なくして立ち入りを禁ず。

けいかいくいき警戒区域keikaikuiki
1.

An area that is declared dangerous or unsafe, often due to natural disasters or hazardous conditions, where caution is advised.

2.

A designated region that restricts access or activities to protect individuals from potential threats or harm, often used in emergency situations.

3.

A specified zone where the presence of risks or dangers is heightened, requiring heightened awareness and preventive measures.