JP Smart Sim This is one of the most popular companies among people who are from overseas. It is easy to make a contract with them and all you need is your Residence card.
You can apply through the Internet, and you can pay from the convenience store. You can also use the credit card like VISA, MasterCard, and American Express to pay for it monthly.
The monthly payment is 3,608 yen per month if you select the 6GB plan.