Nobody

I am unsure, but the mei could be ... 橘 - Tachibana 光起 - Mitsuoki

I do not think so.

西原兼正 - Nishihara Kanemasa

鶴聲 – Kakusei He is a Noh mask craftsman.

I found the tsuba at Yahoo Japan auction. The reading is correct. 橘顕政 – Tachibana Akimasa 以清鐵造之 – Made this from Qing iron.

海軍燃料廠 – Navy fuel factory 製油員 – Refinery operator 里村清吉 – Satomura Seikichi 第三蒸溜工場 – The 3rd distillery

菊一 - Kikuichi

Thank you. Unfortunately, the images do not comfirm my guess. My guess was 鈴虫 - bell cricket.

I think I got it. Could you show me the motif for confirmation?

明珍式部 - Myochin Shikibu 紀宗定作 - Ki no Munesada saku

It must be a typo. --> Tomokiyo

光長 - Mitsunaga

Maybe a family name. 深町 - Fukamachi

明治十七年 – Meiji 17th year (1884) 春三月 – Spring, 3rd month 秋月胤永兼銘 – Akizuki Kazuhisa (AKA Akizuki Teijiro), also serves as a mei. Ref. Akizuki Teijirō - Wikipedia 贈之以賀 – Present this to celebrate. 野口坤之任 – Noguchi Kon’no, being commissioned as … 陸軍少尉 – Army second lieutenant Ref. 野口坤之 - Wikipedia Noguchi Kon'no was one of Akizuki Kazuhisa's students before he was commissioned to the Army.

雲州布部住弘光作 – Unshu Fube ju Hiromitsu saku 昭和十三年二月日 – Showa 13th year (1938), 2nd month