This report focuses on Japan’s mobile market and analyzes the implications of the introduction of Rakuten Mobile and the Japanese government’s open RAN push. The publication date is scheduled a few weeks after the 4 services providers (e.g., KDDI, NTT DOCOMO, Rakuten Mobile, and Softbank) provide their interim report so that we can gather many details about 1H21 and provide a 2H21 outlook, a 5-year RAN forecast, and a 3-year capex outlook. This report also includes subscriber and base station (BTS) numbers and RAN vendor market shares and analysis.