This paper reviews the development of the Internet in Japan in 2018，and describes the four aspects of the development and implementation of the network security policy，the disclosure of Internet data，the promotion of artificial intelligence networks，and personal information protection initiatives. Among them，Japan has the largest initiative in personal information protection. In March 2018，the Japanese government made a second amendment to the Basic Law on Cyber Security，proposing new measures to set up the Network Security Agreement Committee and strengthen international cooperation. At the same time，the government launched and implemented the Law on the Correction of Personal Information Protection on May 30，2017. One of the important measures is to remove the original article “Handling companies and enterprises below 5000 people as not applicable”. All companies，companies and business operators who operate and process personal information are subject to amendments.