SHINPEI has already recruited a bassist (whose name's Jong) as noted in MUSCLE ATTACK in
SHINPEI Solo Project 「MUSCLE ATTACK」E no michi ~Vol.2~ .
While in
SHINPEI Solo Project 「MUSCLE ATTACK」E no michi ~Vol.3~ , SHINPEI ropped in a guitarist (whose name's Shunp) .
Now in
SHINPEI Solo Project 「MUSCLE ATTACK」E no michi ~Vol.5~ , after recruiting Jong & Shunp , in comes probably the last member of MUSCLE ATTACK in the form of a drummer .
Say hello to HIDEHIRO, everybody as what SHINPEI wrote on his blog
yesterday :
Based on what SHINPEI wrote , he & HIDEHIRO know each other for a really long time , close to 10 years worth of a friendship o_o
In addition to being a musician , HIDEHIRO is also supposedly a qualified gym instructor xD xD xD
Why I wouldn't be surprised if both SHINPEI & HIDEHIRO do quite a lot of stuff together , like muscle training & all :p
All the mayhem going on in recruiting the latest new member of MUSCLE ATTACK can be viewed in
SHINPEI Solo Project 「MUSCLE ATTACK」E no michi ~Vol.5~ xD
And here's the current lineup for MUSCLE ATTACK :
1) SHINPEI - guitarist & vocals (yes he's going to sing lead vocals in MUSCLE ATTACK , as noted in
SHINPEI Solo Project 「MUSCLE ATTACK」E no michi ~Vol.4~ 
)
2) Shunp - guitarist
3) Jong - bassist
4) HIDEHIRO - drummer
Judging from what SHINPEI wrote/tweeted , this seems to be the finalised lineup for MUSCLE ATTACK , whee