Sadly until the last few days there was no opponent named for Maruta, and when an opponent isn't named until close to the bout we tend to not expect anyone too testing. That has proven to be the case again here with Maruta's opponent being named as Indonesian foe Arega Yunian (6-9, 1).
Yunian will be best known to Japanese fight fans for his 2013 loss to a then 8-0 Ryo Matsumoto, a 2nd round KO, and his 4th round loss to Takashi Igarashi in 2015. He has also suffered stoppage losses on the road to Panomroonglek Kaiyanghadaogym, Srisaket Sor Rungvisai, Mike Tawatchai and most recently Singsayan CP Freshmart. Given those losses it's hard to imagine Maruta having any issues with Yunian, in what will hopefully be nothing more than a stay busy bout for the Moriaka gym prospect, who is too good to waste much time fighting at this level.
Sadly it seems like Warlito Parrenas (25-7-1, 22) and Naoto Iwai (4-2, 2) [岩井尚斗] will also be in rather straight forward bouts, as both men take on Thai visitors who look like they won't be much of a test for either of the Morioka pairing. It's a shame that the 3 main bouts will all be mismatches, though it does seem like both Maruta and Parrenas will be stepping up in class later in the year.