Kanji Help for Specific Sword Fittings Term

[Soshin]

I need some translation help for a specific sword fittings term. The term is for the inner most part of fuchi that is often but not always a sperate piece of metal. See attached photo for reference. In my research notes I have the term "tenjogane" but I do not have any Kanji associated with this term just a phonetic reading in Rōmaji. I would suspect that the term might consist of a total of three Kanji characters with the last one being "金". Below is a signed tenjogane example of what I am talking about.

 

 

Thanks in advance for anyone that can help me. I will continue my own search for the kanji. I need this for noncommercial purposes for the detailing of my own personal collection on the Tsuba Otaku website.           

[Jussi Ekholm]

I think you were correct with your notes David. It seems to be - Tenjōgane 天上金 or Tenjō 天上

[Soshin]

Thanks, Jussi Ekholm. The term would be (tenjōgane 天上金), which will allow me to complete my notes about a new Higo style fuchi-gashira set that is new to my collection and that I am writing about. Interesting the Kanji "天上" by themselves means the heavens. I wonder why these Kanji were used. 

   

 

 

[SteveM]

天井金 or maybe 天井板 is preferred. 

天井 (tenjō) means ceiling. 

https://www.mokuzai-tonya.jp/05bunen/zuisou/2009/nihontou/11/index.html

[Soshin]

Thanks Steve M. This is very helpful and finding the term in a Japanese language diagram is really important. Searching my online Japanese dictionary (https://jisho.org/) I can confirm the meaning. When I search for the term "天井板" I get the meaning "ceiling boards". Therefore, I am going with the term (tenjōgane 天井金) which is not found in the dictionary and is likely the term I heard used by a Japanese collector.            

 

 

[Jussi Ekholm]

I was looking at few sword glossaries and I think maybe 天井板 suggested by Steve would be the one used most.