Riichi Ueshiba (aka Reach Ueshiba) is a Japanese manga writer and artist born September 4, 1969 (aged 50 as of 2019).
He has written and drawn Yume Tsukai (Dream User) and Nazo no Kanojo X (Mysterious Girlfriend X). These manga were later adapted into their own anime series. Characters from his earlier work Discommunication, also made cameo appearances in the 14th episode (OVA) of Mysterious Girlfriend X anime.
Ueshiba went quiet shortly after concluding Nazo no Kanojo X manga in 2014, most likely to take little break from public life and creating manga. But in 2017 he made comeback with his new manga Ookumo-chan Flashback, which he currently publishes monthly in Afternoon magazine, like all his previous works.
Riichi does not use social media platforms (or even a blog), communicating, only via omakes, or special chapters within his manga, where he often represents himself as one eyed humanoid cat, who offers his opinions on a variety of topics. Also look for cameo appearances of Riichi as the one-eyed cat, called "Bad Cat", in his manga. If you look carefully, you can find in the manga stories a Bat Cat beverages vending machine, Bad Cat canned coffee, a Bad Cat logo backpack, and the trademark Bad Cat on may other consumer items !