Nobody

宗與 – Soyo (Yokoya school) Ref. The Yokoya school in Edo

I guess that such an order was made at the birth of orderer's granddaughter in most cases.

It is a ordered tanto made for Hisako.

於昭和五十一年度新作名刀展出品 – Presented work at the competition of modern Japanese swords in fiscal year 1976 写江雪左文(字)上位入選作 – Replica of Kosetsu Samonji, higher winning work (The character *字” should be there. And original Kosetsu Samonji is a tachi.) 摂津八尾住 – Living in Settsu Yao, 平安城沖芝源信昭作之 – Heianjo Okishiba Minamoto Nobuaki made this. I saw the listing of the tanto on some auctions. The tanto does not match the writing on the box.

因州鳥取住正則 (Inshu Tottori ju Masanori) – Living in Tottori of Inaba province, Masanori 一蝅堂 乘意 – Issando Joi Ref. Issando Joi 一蚕堂乗意 | British Museum

The provincial capital of Hitachi province (常陸國) was Mito (水戸). Suifu (水府) was another name for Mito.

(Owner’s address and name) 和歌山縣伊都郡河根村大字河根 – Wakayama-ken, Ito-gun, Kane-mura, O’aza Kane 亀澗光治 – Kametani Koji/Mitsuji/Mitsuharu 三品義明 – Mishina Yoshiaki - One of WWII smiths in Seki

I clipped the image and corrected the distortion. It might be 正卜 - Masaura.

They might be Obikazari (帯飾り) - Sash ornament. Ref. 銀製ぶら（帯飾り）｜珍しい和装の装身具（アクセサリー）｜オリジナル帯飾りクリップ（プレート）付き | べっ甲かんざし･髪飾り･和装小物専門店 銀座かなめ屋

Ref.

和泉守辻助九郎兼重 – Izumi no kami Tsuji Sukekuro Kaneshige

京城府中區本町 – Keijo-fu Chuku Honmachi 四丁目一六番地 – 4-chome, 16-banchi 堀内吾郎　所有 – Horiuchi Goro, shoyu Ref. Keijō - Wikipedia

It is very rare to see a shinogizukuri tanto. When I see such a tanto, I usually think that it may be a reshaped blade from a broken katana. However, there is a swordsmith who makes genuine shinogizukuri tanto in Japan. Ref. 鎬造り短刀｜製作事例｜肥後虎-HIGOTORA

右正心 - Ushoshin Ref.

Unfortunately, the blade is a fake. Although they tried to make the characters look like Japanese, the characters are not katakana or any other Japanese characters. They are just meaningless.