Talk:Japan/@comment-61.6.237.20-20171030145324/@comment-153.214.113.170-20171117051942

Definitely it is the cheapest one for tourists.

If you have any friend in Japan whon can activate the service, this is even cheaper. (2980 yens 7GB/25 days)

http://www.bmobile.ne.jp/sb/plan_pre.html