Why is it so hard to become a citizen of Japan?

Why is it so hard to become a citizen of Japan?

This article outlines the requirements for becoming a citizen of Japan, which are known to be very strict. To become a citizen, applicants must have lived in Japan for five consecutive years, demonstrate proficiency in both written and spoken Japanese language, pass background checks including criminal records checks, and have sufficient financial resources. The article also discusses the benefits of becoming a citizen of Japan such as access to exclusive job opportunities and being able to own property without restrictions.