En un regard
Le château en bref
堀川城(堀川城)は、「堀川城の伝統的な跡地」とされる場所で、静岡県浜松市浜名区細江町ki-gaに所在する。ki-ga...
Wait, I must be careful: "Kiga" is a place name; I shouldn't invent a kanji reading. The original says "Hosoe-chō Kiga" in romanization; the Japanese form would be 細江町気賀. That's an established name, so using 気賀 is fine, but is it "inventing"? The source gives only the romanization; the established Japanese form is 気賀. Safer to keep the source's romanization? The rule: use established form in target language when it exists. 細江町気賀 is established. I'll use it. Similarly Hamana-ku, Hamamatsu-shi, Shizuoka-ken, Miyakoda river (宮竹川? Not sure—the Miyakoda river is 都田川 in Japanese; that's established). Hime Kaidō = 姫街道. Hamana lake = 浜名湖. Imagawa Yoshimoto = 今川義元. Okehazama = 桶狭間. Tokugawa Ieyasu = 徳川家康. Horikawa ikki = 堀川一揆. Gokumonnawate = 獄門曝し場 ... the established name is 獄門磔 ... Gokumonnawate (獄門畷) is the established name. Keep 獄門畷 with reading maybe; I'll write 獄門畷.
Hirajiro = 平城 (plain castle) — the translation can gloss as 平城.
Quotation marks: use 「」 for Japanese.