Nobody

The Cultural Properties Protection Law took effect in 1950. And the tanto Inaba Shizu became a Juyo Bunkazai. Ref. 稲葉志津 - Wikipedia (Only Japanese language available) The following part is extracted and auto translated. ================================================================= On December 20, 1934 (Showa 9), it was designated an Important Art Piece under the name of Marquis Naganari Kuroda. Subsequently, on May 27, 1939 (Showa 14), under the same name, it was designated as a National Treasure (formerly a National Treasure) under the National Treasure Preservation Law. After the enforcement of the Postwar Cultural Properties Protection Law, it was designated as an Important Cultural Property, and since then, it has been owned by an individual in Aichi Prefecture, leaving the Fukuoka Kuroda family. ======================================================

Today I visited a friend of mine. His wife is a professional calligrapher, and I asked her about the third kanji in this phrase. “★★★作之珍重 ＊ ??? no chinch” She could not decipher the kanji with confidence either. But her guess was 孔. Assuming that the kanji is 孔, the phrase may be like this. 面白孔作之珍重 (Omoshiro ki ana no saku, kore chinch.) – The work with interesting holes, it is valuable.

佐藤兼住 - Sato Kanezumi He was one of WWII swordsmiths in Seki.

The second kanji is 乾 as @MauroP said. I cannot decipher the first kanji. I thought it looked like 夲 ( 夲 - Wiktionary, the free dictionary ). However, even if it is 夲, I cannot understand 夲乾.

I cannot see a gourd, but two horses. Willow and horses design seems to be one of popular themes for paintings. Ref. 日本刀販売・買取の銀座長州屋｜名刀鑑賞ガイド　金銅単鳳環頭大刀柄頭 Ref. 柳に馬 - Google 検索

行年七十才 – 70 years old 堀江興成 – Horie Okinari

竪丸形 鉄地肉 ＊ tatemaru-gata tetsu-ji niku- 彫 銘 一柳友善作 ＊ bori mei Ichiryū Tomoyoshi saku 初代作也力作 ＊ shodaisaku nari, rikisaku 昭和辛亥卯月 ＊ Shōwa kanoto-i Uzuki [1971, April] 寒山誌 ＊ Kanzan shirusu (kaō)

I think your reading is correct.

My guess is, 武一 - Takekazu/Takeichi (reading?)

I agree with "候". 出来宜敷候 * Deki yoroshiku soro.

For the first tsuba, this part is not asked. But the reading is incorrect. 竪木瓜形 * Tate-mokkō-gata

The translation is totally wrong. 令和6年11月13日交付 – Issued on Reiwa 6th year (2024) 11th month 13th day. It is the date when the registration paper was issued.

As for the second sword, 手柄山勝重精鍛作 – Tegarayama Katsushige forged. 元治紀元八月日 – The first year of Genji (1864), 8th month I could not find a smith in the era with the name.

I only know that it is one of variant forms of 人. I think that there is no deep meaning. Ref. File:U3139a.svg - Wikimedia Commons BTW, I usually write 7 in the left form in the attached image, whereas most people here write 7 in the right form. Because, when I was young, I often read German blueprints with handwriting characters, and I liked them.

Whoever said that was completely different. 尾州住人真野光弘作之 (Bishu junin Mano Mitsuhiro saku kore) – A resident of Bishu (= Owari province), Mano Mitsuhiro made this.