I saw some of this in Hirokazu Yasuhara's twitter (the level designer of the first Sonic games)
He seems to be a Yotsuba fan.
That's neat. No, I hadn't heard anything about that. Azuma doesn't seem to tweet anymore these days.
Too bad I'm not still in Japan.
Oh wait, Azuma did tweet about this a couple of weeks ago. He hadn't tweeted since last April (2017) so I'd stopped checking as often.
Can't blame him - cuteness is cuteness.
Also, it's nice to see how much extra detail you can get from the originals versus what goes into a smaller tankubon.