The official Twitter account for Fujino Omori’s Danmachi has revealed that the light novel has crossed a milestone of 4 million copies in print.
【重版のご報告】ダンまち6-8巻が重版決定! そしてこの重版によりシリーズ累計「400万部突破」いたしました! これも皆様のおかげです。本当にありがとうございます! でもベルの冒険はまだ道半ば。これからも応援宜しくお願いいたします! pic.twitter.com/51e2PdGyxZ
— GA文庫『ダンまち』シリーズ公式 (@danmachi_GA) January 28, 2016
In addition to this, Gree mobile game Cross Istria is celebrating this feat with its own milestone of 100,000 registrations with a special campaign, awarding logins from February 7-12 with a chance to get 6-star Toothpaste Bishoujo Goddess-chan and 6-star Toothpaste Shonen, with art based on the J.C.Staff anime opening. There’s also special Valentine’s Day cards.
Source: Crunchyroll