Why has korea had the most cultural influence on japan?

The Korea influence on Japan was originated in the Korean Peninsula mainly  on Japanese  institutions, culture, language and society.

The Korean peninsula was the bridge between Japan  and China, and East Asian history; these influences have been detected in a variety of aspects  of Japanese culture that includes the technology, philosophy, art.

Remarkable examples of Korean influence on Japanese culture include the prehistoric migration of  Korean peninsular people to Japan. And the introduction of Buddhism to Japan has discerned in Japanese painting and architecture.

2 is armenia i think

the use of email to replace slower surface mail.