Which of the following are mandatory fire safety requirements for multi-story buildings in Japan

Which of the following are mandatory fire safety requirements for multi-story buildings in Japan

Which of the following are mandatory fire safety requirements for multi-story buildings in Japan?

A. Fire-resistant walls

B. Automatic sprinkler systems

C. Fire doors in stairwells

D. Smoke detectors

Answer: ABCD

Explanation: All four are mandatory fire safety requirements.