help understanding a tsuba and Hozon paper, translation help please

[Mark]

Grey and i picked up a tsuba.  We are having trouble understanding the inscription. 

 

We see 

left --- Masa Toshi Saku Kore   so we think Masatoshi made this but i guess maybe it could be read differently like Sho???

 

right side -- we are lost, maybe   O (Nori Toku),   Aki ,  Hiro,   Tsune  ????   probably completely wrong

 

Also we note the Hozon paper uses a different kanji for Toshi, so we are not sure if the paper uses an abbreviated form of the kanji on the tsuba or maybe the NBTHK knows who this is and the maker used this other kanji as well ??

 

any help appreciated, thanks  Mark and Grey