2PM was originally scheduled to release their 5th Japanese single "Masquerade" on August 29th, but the date was unfortunately postponed due to Nichkhun's DUI incident. With the announcement of Nichkhun ending his hiatus, it seems 2PM will be also gearing up to restart their official Japanese activities.

On October 5th, 2PM's official Japanese website was updated with news stating that "Masquerade" will be released in mid-November. Additionally, after the announcement of their global tour, it was revealed that 2PM will have a nationwide tour across Japan in the Spring of 2013.

Source: 2PM's Official Japanese Website
Tip: Paula