Some findings

3 new High Profile ex-Capcom

Hirotada Miyatake

Koshi Watamura

Mitsutoshi Kodama

plus

Tomohito Hashiguchi

Kazuyuki Endo

Atsushi Nishibori

Shinya Wada

Daisuke Shimizu

Jordan Amaro

Former Camelot Soft Artist and Art Director from Mario Tennis Ultra Teppei Kamata seems to have joined 1-UP

Yujiro Mori, former Lead Artist from Clap Hanz (Everybody Golf) also seems to have joined 1-UP

Another gaijin joined Nintendo, the first Composer/Sound Designer, Pedro Avelar Gontijo who previously worked on Metal Gear Online

This is the game the indie developer Ojiro Fumoto(Downwell) worked in the months he spent at Nintendo in 2018