Long Wakizashi with Hi in Shin-Gunto Mounts

Signature:  Too worn to read, first Ji is San or Yama, the rest is indistinct, side which should have nengo has numbers five, ten and six, which could be read as 56 but with part missing it is hard to guess the meaning of that number. The parts of the nengo and mei were most likely lost when the machi were moved upward.
Year Made:  Most likely Shinto or Shin-shinto
Forging Pattern: Very difficult to tell do to a covering of fine scratches, appears to be a very tight hada of some kind. 
Tempering Pattern: Very hard to see, looks to be midare in ko-nie.
Dimensions:  Blade Length:  22 inchesNakago: 5.75 inches 6 mm thick and 28 mm wide at Hamachi
Mountings: Plain wood saya in leather combat cover '34 pattern Shin-gunto tsuka with plain brass fuchi covered by retaining strap, wrap in good condition, kabutogane with much wear and no sakura (cherry blossoms) cast on the surface, plain wire saruto, nice "rain" pattern copper habaki. Civilian tsuba with floral decorations, difficult to tell age but appears cast. Copper seppa. 
Overall Condition:  Good. While, as the photos will show, it is almost impossible to make out any details of workmanship on the blade. With careful examination a full hamon and boshi can be detected. The hi is well carved, the forging seems well done and the sword has a graceful shape to it. There is a nick in the ha and some pitting, probably the scratches were a result of a cleaning attempt. Should polish with no problem. And the mei would be an interesting research project for someone.