The Key to Room 403 (四〇三号室 の 鍵) is a free A1 Japanese mystery. Yumi, a new graduate, rents a suspiciously cheap flat in Shibuya. The smiling landlady gives her two keys but won't explain one, a small door isn't on the floor plan, and someone else's clothes are still in the wardrobe. Chapters 1 and 2 are below.
Level
A1 (Beginner)
Genre
Mystery
Free here
Chapters 1–2 of 6
Length
216 words, about 2 minutes
Language
Standard Japanese
Tap or click an underlined word to see what it means.
She is a new graduate with a small salary, and this rent is cheap. Too cheap: 「安すぎる。」
What does Mrs Satō give Yumi, and what does she refuse to say?
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Two keys. One is for the front door; when Yumi asks about the other, Mrs Satō just smiles.
What is strange about the flat?
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Besides the front door there is a second, small door with a keyhole, and it isn't on the floor plan. The wardrobe still holds a woman's clothes: a black sweater and a red skirt.
What does the neighbour tell Yumi in chapter 2?
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That the building is strange, and nobody knows where the last resident went.
What is Yumi wondering at the end of chapter 2?
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Whether it is all right to open it: 「開けて も いい の か」
Grammar to notice: plain form in the narration
Most A1 Japanese is written in the polite です / ます style. This story narrates in the plain form instead, the style of novels and diaries: dictionary-form verbs, だ in place of です, and ない for "not". When Yumi speaks to her landlady, she switches back to polite Japanese, so you see both styles side by side.
由美 は 部屋 に 入る。
Yumi wa heya ni hairu.
Yumi goes into the room.
入る is the dictionary form. Polite: 入ります.
佐藤 夫人 は 答えない。
Satō fujin wa kotaenai.
Mrs Satō doesn't answer.
Plain negative. Polite: 答えません.
素敵 だ。
suteki da.
It's lovely.
だ is the plain version of です.
由美 は 怖い。
Yumi wa kowai.
Yumi is scared.
An い-adjective simply ends the sentence in plain style. Polite: 怖い です. Chapter 2.
これ は 玄関 の 鍵 です
kore wa genkan no kagi desu.
This is the front-door key.
The landlady speaking to Yumi, so polite です.
Every plain form here has a polite partner you probably know already, so read 入る and think 入ります. After a few paragraphs the plain style stops looking unfamiliar.
Reading tips for The Key to Room 403
Japanese names put the family name first: 田中 由美 is Yumi Tanaka, and the narration calls her 由美. The landlady is 佐藤 夫人, Mrs Satō, an old woman who says very little.
The flat itself is the puzzle, so the useful words are about housing: 家賃 (rent), 玄関 (front door), 間取り図 (floor plan) and クローゼット (wardrobe). Chapter 1 has some words that are hard for A1, such as 新卒 and 日当たり (sunlight in a room); tap them and keep going.
Watch the keys. Yumi gets two in chapter 1, one door is unexplained, and the question of whether to use the small key carries the ending of chapter 2.
Frequently asked questions
Is this story harder than other A1 Japanese stories?
A little. The narration uses the plain form (だ, ない, dictionary verbs) rather than です and ます, and there are some housing words like 間取り. The sentences stay short, and tapping covers the rest.
How many chapters are there?
Six at A1. Chapters 1 and 2 are free here and in the app; chapters 3–6 are part of Contos Premium.
Where is the story set?
In a flat in Shibuya (渋谷), Tokyo. Yumi has just started work after university, which is why cheap rent matters so much to her.
Is there romaji in the app?
No. Contos writes Japanese in kana and kanji with spaces between words, with no romaji or furigana. Romaji appears on this page only to help with the grammar examples.