Kanji Library
Counters › 階

階 (kai) — counting floors of a building

Which floor something is on. The ground floor is 一階 (いっかい) in Japan — there is no British-style “ground floor / first floor” split.

How to count with 階, 1 to 10

#ReadingRomajiWritten
1ikkai1階
2nikai2階
3sangai3階
4yonkai4階
5gokai5階
6rokkai6階
7nanakai7階
8hakkai8階
9kyuukai9階
10jukkai10階

🔊 Tap any reading to hear it spoken.

Watch out

三階 is usually さんがい, though さんかい is also heard. Everything else follows the plain か行 pattern.

In a sentence

JapaneseReadingMeaning
ごかいにいきます
gokainiikimasu
I am going to the fifth floor.
ほんやはさんがいです
honyahasangaidesu
The bookshop is on the third floor.

The kanji

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