As you might have noticed, this period for the Taiko no Tatsujin franchise is heavilly filled with cross-overs and collaborations all over the place. However, while most of those special events are openly advertised by the Taiko Team both on the official site and on the blog, some other ones are less advertised. Thus, enter the latest Sorairo-related arcade collaboration!
Much like what happened with the Katsu-Don costumes, another couple of special outfits can be unlocked with special Taiko images as well. CoroCoro magazine's August issue (released last Saturday, on July 14th) and Ciao! magazine's September issue (to be released from August 3rd onwards) have a Taiko-themed image within their pages that will grant the permanent unlock of the promotional costumes above for a limited period of time.
In order to unlock said outfits, slot in your coins with your Banapassport profile activated and then select the magazine campaign banner of choice, depending on the issue owned.
Once the arcade's camera function is turned on, just show the Taiko-related picture in the magazine in order to claim your unlock! Only one of these promo costumes can be achieved with a single credit, so a second play at the arcade is required in order to get both the digital presents.
As also shown in the images above, the CoroCoro costume can be unlocked until September 1st, while the Ciao! outfit has its deadline set the day later, September 2nd.