How to say “Watch that bag as you cross the platform; someone left it beside the seats.” in Japanese
In Japanese
その台の上を通るなら、あのバッグに気を付けて。誰かが座席の横に置きっぱなしにしてる。
Sono dai no ue o tōru nara, ano baggu ni ki o tsukete. Dareka ga zaseki no yoko ni okippanashi ni shiteru.