助けてください！
Tasukete kudasai!
Please help me!
core
Loud and clear. People will respond.
救急車を呼んでください
Kyuukyuusha wo yonde kudasai
Please call an ambulance
core
Emergency numbers: 119 (ambulance/fire), 110 (police).
パスポートをなくしました
Pasupooto wo nakushimashita
I lost my passport
core
Go to the nearest 交番 (koban / police box) first.
具合が悪いです
Guai ga warui desu
I'm feeling sick / unwell
core
痛い (itai) = it hurts. Point at where.
大使館に電話してください
Taishikan ni denwa shite kudasai
Please call the embassy
extra
Know your country's embassy number before you go.