Fabio, who played for five years in Japan from 2010-2014, will be the second South American to play for the Reds this season alongside Uilliams Souza.
Yusuke is a versatile Japanese defender who played in Japan, Cambodia and most recently Laos.
Commenting on the signings, Lajong head coach Thangboi said: "Fabio will give us more height and prowess up front and his strong work ethics will help the team defensively too. Yusuke's experience and leadership will bolster our defence.