What is the best way to travel across Japan as a foreign tourist staying on a tourist visa?
JR rail pass is probably the most efficient and economic option to get around the country. You need to purchase this pass in advance before arriving in the country. Once you are in Japan, you go to a train station and activate your pass. If you want to travel around and visit multiple cities in a short time, this pass is definitely worth it.
Instruction: What is the best way to travel across Japan as a foreign tourist staying on a tourist visa?
Context: 
Response: JR rail pass is probably the most efficient and economic option to get around the country. You need to purchase this pass in advance before arriving in the country. Once you are in Japan, you go to a train station and activate your pass. If you want to travel around and visit multiple cities in a short time, this pass is definitely worth it.