Trying to identify features on Katana blade

[Lookin4answers]

There are a couple of features present on this Katana blade that I am trying to identify with more certainty. There appear to be a number of streaks in the Hamon with a particularly dark streak in one area that I can’t seem to put a name to. The photos don’t do it justice, and forgive my ignorance, but could it be kuichigai-ba? Are these flaws in the blade? 

 

 

The Boshi appears to have almost a mottled flame/irregular appearance that is very difficult to capture in pictures. Could it be Kaen??, or Nie-kuzure??, or am I way off here?

 

 

And finally, the sword does appear to have damage from sword to sword combat. How much does this damage affect the potential value of the sword. In particular, the one big perpendicular gash across the blade doesn't appear to me to be fixable/repairable/polished out as it goes pretty deep into the blade (but what do I know). The lighter contact nicks may be more readily repaired?

 

 

Many thanks to you all for your time and any information you can provide. It seems the more you know, the more questions you have. I appreciate the knowledge and willingness of forum members to help answer some of those questions. 

 

Regards,

Hunter