留守番（るすばん、rusuban）
- house sitting

The Japanese word 留守番, pronounced るすばん (rusuban), means "house-sitting," "taking care of the house while someone is away," or "staying home alone." It implies a responsibility to be present at a house or location while the usual residents are absent. This often involves answering the phone, receiving deliveries, or simply being there to prevent any issues. The role of 留守番 can range from a few minutes to several days, depending on the situation. The person performing the role is sometimes referred to as the 留守番 person.

⚫︎ お母さんは旅行中で、私は留守番しています。 Translation: My mother is on a trip, and I am house-sitting. ⚫︎ 犬の留守番をお願いできますか？ Translation: Can you take care of the dog while I'm away? ⚫︎ 電話が鳴ったので、留守番の人に電話に出てもらいました。 Translation: The phone rang, so I had the person house-sitting answer it.

You use 留守番 when you're talking about someone staying at a house (or other location) while the usual occupants are away. ⚫︎It's common to use it when referring to children, pets, or other individuals who are left at home. ⚫︎You can use the verb する (suru, "to do") to create phrases like 留守番をする (rusuban o suru, "to do house-sitting"). ⚫︎You can also use it to inquire about someone's activities, such as asking 今日は誰が留守番するの？ (kyou wa dare ga rusuban suru no?, "Who is house-sitting today?").

⚫︎The word 留守番 is primarily written in kanji and hiragana: 留守番. ⚫︎The kanji 留守 (rusu) means "absence" or "being away from home," and 番 (ban) means "watch" or "guard." ⚫︎The okurigana (hiragana attached to the kanji) is 番 (ban).

There aren't direct, single-word synonyms that precisely match 留守番. However, phrases and related words could include: ⚫︎ 家を守る (ie o mamoru, "to protect the house") ⚫︎ 番をする (ban o suru, "to keep watch") ⚫︎ 世話をする (sewa o suru, "to take care of," can be used with pets or younger siblings.) ⚫︎ Depending on the context, you might also use a phrase like "looking after the house".

There is no exact antonym for 留守番, but the opposite would be the action of leaving the house, which could be implied with phrases. ⚫︎ Going out / being away from home. ⚫︎ 外出する (gaishutsu suru, "to go out") ⚫︎ 出かける (dekakeru, "to go out")

夏休みの間、弟が留守番をすることになりました。 ・Translation: My younger brother is going to house-sit during the summer vacation. ・Explanation: This sentence describes the arrangement for the brother to be in charge of the house while the family is away.

ご旅行中、ペットの留守番はどうされますか？ ・Translation: How will you handle pet-sitting while you are on vacation? ・Explanation: This sentence asks about the plans for caring for a pet when the owner is away.

The word 留守番 is a compound word formed from two parts: ⚫︎ 留守 (rusu): This part signifies the state of being away from home or absent. ⚫︎ 番 (ban): This refers to the act of guarding, watching, or taking care of something. Therefore, the word's etymology clearly indicates its meaning: "to stay and watch/guard during someone's absence."