Restrooms
Public restrooms are easily found on the street, at the train station, and in fast food restaurants. Restrooms are separated by gender, usually cost a small amount (have change handy), and are checked by an attendant. Hours of operation vary.
English Word or Phrase: Where is the nearest restroom?
English Word or Phrase: May I use the restroom?
English Word or Phrase: May I have the key for the restroom?
English Word or Phrase: What is the cost please?

Gas station restroom: the sign says to ask the attendant for a key.
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Gentlemen's restroom sign
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Women's restroom sign
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Ladies' restroom sign
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Men's restroom sign