Zhuque Mirror acquired.
「朱雀の鏡」を入手しました。
101Leafy researched the game with the Hilltop Works fan translation patch, English translation by Cargodin

Zhuque Mirror is item 84 of the game's item table, in the Items group. The script names it on disc 4.
Lines of the script that name it, each with a link to its place in the script.
Zhuque Mirror acquired.
「朱雀の鏡」を入手しました。
Were you looking for me?
I figured you'd lose your way back. Guess you're up against a grudge so ill-boding, it can distort space-time.
... I knew Xiaohei was born here. I knew it the moment I saw her face, back when she first walked up to me.
Only, there was no way I'd be the one to tell Xiaohei the truth.
All I could think to do was treat her like any other lady living in 1997, but then, you appeared in Kowloon.
And now, that city needs you, right? Then use this mirror. It's called the Zhuque Mirror.
I've been using it to travel between this era and that one.
俺を捜していたのか?
やはり…戻れなくなってしまったんだな…時空を歪めるほどの暗い意志だ…それに立ち向かおうというのか…
小黒がこの時代に生まれたことは知っていたよ。あいつがひょっこり俺の店に顔を見せた時、すぐに……
だが、小黒に真実を語ることなんてできなかった…
あいつは1997年で生きようとしていた…俺にはそう思えたんだよ。あんたが、あの九龍に現れるまでは…
あんたは戻らなくてはならない、そうだろ?この鏡を使え。朱雀の鏡だ。
俺はこの鏡で二つの時代を行き来していたんだ。
Right on time...! Well, that's what I'd LIKE to say, but my HELL SPAWN force-synced our armillary spheres!
Rather, that's my only guess... because the date you're supposed to return to up and disappeared!
I saw it so clearly, last I checked, but the times now must be misaligned.
As it stands, I've no way to send you back anymore...
Wait, I know! Li Hong! LI HONG! How could I forget? You can ask him! He's from 1997, the same era as you!
He might have just the thing! It's a mirror! The Zhuque Mirror!
That's what he uses to travel! Yes! Li Hong can time travel!
待ってたぞ…と言いたいところなんだが、子孫めが無理矢理に渾天儀を合わせよって…
それが原因としか考えられん…君が戻るべき日付が…消えてしまったのだよ!
さっきまではくっきり見えていたんだが…やはり時刻がずれておるのかなあ…
このままでは君は戻ることができなくなってしまう…
そうだ!季弘だ!季弘!なんで忘れておったのか!やつに頼め!同じ時代だよ!1997年!
やつなら何とかできるかもしれん、鏡だ、朱雀の鏡を使えば!
あいつはそれで行き来していた、そうだ、この時代と君の時代とを!
Item table: Five Mountain Drawing Zhuque Mirror Monster ROM
English translations by Cargodin for Hilltop Works Fan Translation Patch: https://www.patreon.com/hilltopworks/posts/kowloons-gate-160555525?collection=18503