Nobody

陸奥守綱宗 – Mutsu no kami Tsunamune A real daimyo who enjoyed making swords. Ref. Date Tsunamune - Wikipedia

相州住秋廣作 - Soshu ju Akihiro saku

昭和二十年十一月二十七日 – Showa 20th year, 11th month, 27th day セレベス島マカッサルにて – At Makassar in Celebes Island 中西次郎 – Nakanishi Jiro

Ref.

濃州三品義昭作之 – Mishina Yoshiaki in Noshu (Mino province) made this. He was one of the WWII smiths (RJT).

The correct kanji for this Fuyuhiro should be 冬広(or 廣).

昭和十七年 – Showa 17th year (1942) 貞弘 – Sadahiro

飛騨守氏房 – Hida no kami Ujifusa

Kaneaki

昭和十九年五月 – Showa 19th year (1944), 5th month 兼玄 – Kaneharu Ref.

濃州大杉住石原兼直作本鍛之 – Noshu Osugi ju Ishihara Kanenao made, traditionally forged.

長谷部 - Hasebe 但大磨上無銘之 – However, Osuriage and mumei. 時代南北朝初期 – Period: early Nanbokucho 刃長貮尺貮寸九分有之 – Blade length is 2-shaku, 2-sun, 9-bu (= 69.4 cm). 昭和五拾年師走日 – Showa 50th year (1975), December 寒山誌 – Kanzan wrote.

寶劔 – Sacred sword 天國 - Amakuni

You are right, and it also reads "yomai shitate".

Any blades under 15 cm do not have to be registered except daggers. Daggers over 5.5 cm are always illegal. Usually, a kogatana does not need to be registered only because its blade length is less than 15 cm. There is no description of mekugiana in the Act for Controlling the Possession of Firearms or Swords and Other Such Weapons.

肥後住忠利 - Higo ju Tadatoshi Ref. 刀　肥後住忠利　昭和十八年五月日　Katana [Kumabe_Tadatoshi]日本刀　刀剣販売 サムライ商会[samurai shokai]

Yes, 信光 - Nobumitsu. Ref. 陸軍受命刀匠【信光 昭和十八年十月】太刀銘 『名古屋造兵廠』刻印入 元幅3.2cm超の豪壮刀！稀少鉄鞘拵 四方猪目雁金透かし鍔 [dKPX230100] - 32,000円 :

FYI: A genuine Sukenao with the same date inscription (February 1693) －　津田近江守助直 元禄六歳二月日 Tsuda Ominokami Sukenao　－　日本刀の通信販売　明倫産業株式会社

定治 – Sadaharu 定治 – Sadaharu 花唐草透 – Flower arabesque openwork

1. 遠見松透 紋造作 – Openwork of a view of pine trees, Monzo made. 平成壬申五月日 – Heisei mizunoe-saru (1992), 5th month 紋造作之 – Monzo made this. 2. 太刀透鐔（甲冑師） - Tachi sukashi tsuba (kacchushi) 甲戌作之 – Made this in the year of kinoe-inu (1994) 紋造 - Monzo

The item at the bottom of the tsuba looks to be 竹蛇籠 (takejakago) – gabion.

FYI: Tsuba with design of birds, waves, crags, mountains and moon – Works – Museum of Fine Arts, Boston

I do not understand what you are saying. But anyway, the first day of Koka era was Koka 1st year, 12th month, 2nd day (Lunar calendar in Japan at that time). The day is equivalent to January 9, 1845 (Gregorian calendar), or December 28, 1844 (Julian calendar).

Maybe, 若芝 - Jakushi 平三郎 - Heizaburo

I do not think that the registration paper belongs to your blade. - The length of the blade written on the paper is 1-shaku 6-sun 4-bu (= 49.7 cm), whereas the length of your blade is 48.2 cm. - The pater says that there is a 清綱 mei on the omote-side, whereas there are three characters on the ura-side on your blade. Although I cannot decipher the three characters on your blade except the first 清, the inscription does not look like Kiyotsuna (清綱) to me. BTW, the registration paper was issued on July 10, 1951 (昭和廿六年七月拾日).