Basement Key acquired.
「維多利亜大廈地下の鍵」を入手しました。
101Leafy researched the game with the Hilltop Works fan translation patch, English translation by Cargodin

Basement Key is item 79 of the game's item table, in the Items group. The script names it on disc 2.
Lines of the script that name it, each with a link to its place in the script.
Basement Key acquired.
「維多利亜大廈地下の鍵」を入手しました。
Item table: Victoria Mansions Key Basement Key Life Orb
English translations by Cargodin for Hilltop Works Fan Translation Patch: https://www.patreon.com/hilltopworks/posts/kowloons-gate-160555525?collection=18503