New Tantō Signature Help

[Soshin]

I have this new shinshintō tantō that picked up at the Tampa show last weekend.  I think the nakago read 'Sashū Mikawa Tensaido'.  The reading of the signature is based upon the previous owners notes.   The tantō is also dated on the reverse side.

 

Please note I am a professional Japanese fine art and antiques dealer and have studied Japanese language myself.  I often don't need help with these type of things but i can't find any information about this swordsmith.  I will at some point down the line use this information to help sell the Tantō.   

[Brian]

Have to wonder why the patina was filed and cleaned around some of the kanji. Very curious tanto.
 

[Soshin]

Have to wonder why the patina was filed and cleaned around some of the kanji. Very curious tanto.

 

Good question.  I have no clue. 

[John A Stuart]

I can't find reference to 天生土, but, I would posit it as being Amatsu, possibly Amato. John

[Soshin]

I can't find reference to 天生土, but, I would posit it as being Amatsu, possibly Amato. John

 

Looking up the Kanji some more and these are also possible readings on the artist name.  Thank you John.   

[uwe]

Date seems Meiji 2 second month! (no warranty ???? )

[Soshin]

Date seems Meiji 2 second month! (no warranty )

 

Uwe, Yes I agree in terms of the date.  Thank you.