Rakuten Mobile announced the full commercial launch of its low-cost data plan in Japan today. Priced at 2,980 yen (about $27) per month, the plan gives users unlimited calls and data where Rakuten has its own networks. The company also raised the amount of domestic roaming data in response to increased usage of remote working and online education tools. Earlier this week, Prime Minister Shinzo Abe declared a state of emergency in seven prefectures, including Tokyo, after a new wave of COVID-19 cases in March.