How to Say "Stay Home" in Japanese

家にいる

ie ni iru

To stay home in Japanese is 家にいる (ie ni iru).

The phrase is used to describe the act of remaining inside one's own house instead of going out.

What does it mean word for word?

家 (ie) means house or home, while the particle に (ni) indicates the location where someone or something exists.

To make the phrase polite and suitable for speaking to strangers or superiors, change the verb from いる to います to form 家にいます.

ie ni iru

The verb いる ('to be' or 'to stay') used in this phrase is used exclusively for living things, meaning you cannot use it to say an object is 'staying' at home.
While 家にいる describes staying home, Japanese has a specific word ひきこもり ('hikikomori') for those who stay home for months or years as a form of severe social withdrawal.
In Japanese, the word うち ('home') is also used as a grammatical marker to distinguish 'inside' people from 'outside' people, such as when referring to a coworker as 'my' person to a client.

僕は家にいるよ。
I'll stay home.
This sentence is useful for stating the intention to stay home using 家にいる.
Tatoeba #81982 by bunbuku, translation #321732 by CK
家にいると思う。
I think I'll stay home.
This sentence shows how to express a thought about staying home using 家にいる.
Tatoeba #11609983 by small_snow, translation #5849736 by Hybrid
家にいる予定です。
I'm just going to stay home.
This sentence demonstrates how to express a plan to stay home using 家にいる.
Tatoeba #187119 by bunbuku, translation #24256 by CK
10 more sentences on Tatoeba

Two friends are talking on the phone about their weekend plans.

結衣 Yui

陽太君、週末は何をするの？
Youta-kun, shuumatsu wa nani o suru no?
Youta, what are you doing this weekend?
陽太 Yota

特に予定はないから、家にいるよ。
Tokuni yotei wa nai kara, ie ni iru yo.
I don't have any special plans, so I'll stay home.
結衣 Yui

そうなんだ。じゃあ、また今度遊ぼうね。
Sou nanda. Jaa, mata kondo asobou ne.
I see. Well, let's hang out another time.
陽太 Yota

うん、また連絡するよ。
Un, mata renraku suru yo.
Yeah, I'll contact you again.

Sources

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