Rumors and heresay were finally laid to rest at the One Punch Man Fall Festival held in Japan over the weekend. The staff of the popular anime confirmed that there will be a second season and later tweeted the same news
Unfortunately, there is no solid date as of yet but the tweet reads as follows:
Sent today 9/26 (Monday) at 12 o'clock TV anime "one punch man" release of the second phase of production decision and the 2017 smartphone game app Japan and China delivery decision. The latest information will be announced at the official site and Twitter from time to time!
We'll keep an eye out for a solid date and update this post accordingly. In the meantime, you can watch One Punch Man Season 1 for free @ toon.ninja