The various spoken and written forms of words and characters covering digits, numbers, numerals, including derived forms such as ordinals.

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29
votes
6answers
1k views

Arabic numbers: half-width or full-width?

Using my computer, I type a lot of numbers in Japanese text, and I am not sure when to use half-width or full-width. Are there rules? Right now I only use half-width, is it fine? Off-topic: Here is ...
23
votes
4answers
6k views

How to choose between “よん” (yon) vs “し” (shi) for “四” (4) and “しち” (shichi) vs “なな” (nana) for “七” (7)?

Two numbers in Japanese have two pronunciation alternatives. 四 / 4 can be pronounced either "よん" (yon) or "し" (shi) 七 / 7 can be pronounced either "しち" (shichi) or "なな" (nana) I know that "し" ...
20
votes
2answers
505 views

Why is 二十歳 pronounced はたち?

二十歳 is a (to me) bizarre exception to the usual number+さい rule for discussing age. Is this rooted in 20 being the Japanese age of majority? Added: To be more specific: why isn't it pronounced にじゅうさい ...
19
votes
4answers
1k views

Differences between 度 and 回 when counting occurrences

What are the differences between using 度 and 回 when used to count number of occurrences? For example: そんなことは一度もしたことがない そんなことは一回もしたことがない Are there any restrictions on what kind of actions referred ...
18
votes
3answers
1k views

Rules for slang of Japanese numbers

I often hear Japanese using a different method for saying a number like "248" as によんぱ — especially for highways and license plates. While this one is easy to understand, there are others that I ...
17
votes
1answer
2k views

Can you say “half hour” or must you say “30 minutes”?

I know that to say an hour and a half you can say 一時間半, but is it possible to express simply half an hour even though the counter comes before 半? Or would you just have to say 三十分? If both ways are ...
15
votes
1answer
565 views

Temperature abbreviations?

A certain dialog in my book has a man describing the symptoms of his cold to the doctor. It reads thus: 医者:熱はありますか。 ...
13
votes
5answers
2k views

Is there a reason why numbers in Japanese are delimited into blocks of four?

As I understand, Japanese numbers are divided into blocks of four, so while we would think of the number 89123889 as 89,123,889, in Japan they would think of it as 8912,3889 (八千九百十二万三千八百八十九). So ...
13
votes
1answer
428 views

Japanese/Chinese numbers usage timeline

Japanese uses both native and Chinese numbering numbering systems, the Sino-Japanese pronunciations being いち, に, さん, etc. and the native being ひと, ふた, み, etc. For the most part they are used for ...
12
votes
2answers
260 views

How to read the X in 5X4間?

A book about architecture I'm trying to read (it's a bit of a slog what with the technical jargon and such) contained this description of a temple building: 二重、初重5X4間、裳階 (もこし) つき、上重4X3間. So it's two ...
12
votes
1answer
342 views

What do the question marks on these gas station signs mean?

ハイオク: 148? レギュラ: 137? 軽油: 115? What meaning do the question marks have?
11
votes
3answers
2k views

About writing numbers using Japanese numerals vs using Arabic numerals

I noticed that even though Japanese language has kanji characters for numbers (e.g. 十、百、千、万 etc), there are many places where Arabic numerals are used instead, for example, prices for shop items are ...
11
votes
4answers
274 views

Range of numbers

How would one express a range of numbers regarding an action? Example: I usually study anywhere between 2 to 4 hours a day. Would the からーまで grammar structure be appropriate here? ...
11
votes
4answers
405 views

Counters In Japanese

I'm a super beginner in Japanese, so excuse me if this question is really simple. Or stupid. As an exercise, sometimes I count up the things on nearby desks or tables and try to list them in ...
10
votes
3answers
2k views

Are there native Japanese numbers greater than 10? What use are they?

Most people who've taken a Japanese 101 class know the 10 native Japanese numbers (一つ、二つ・・・十). It's always seemed odd that a system would stop at 10 when so many things in life need larger numbers. ...
10
votes
2answers
304 views

Why are furigana for number kanji almost always omitted?

Here's an example sentence from 北斗の拳 which uses a fair amount of furigana throughout. xxxに残された命は三日... Which includes furigana for のこ, いのち, and, bafflingly, even the か of 日, but none for 三. While ...
10
votes
1answer
273 views

The first: 第一 vs 一番 vs 第一番

What are differences among 第一, 一番 and 第一番, all of which seem to mean "the first" in English? Are any of them more suitable for some specific scenarios than the others (e.g. 安全第一 but 世界で一番)?
10
votes
1answer
640 views

Reading fractions

In Japanese (and other East Asian languages), the denominator of a fraction is read as a part of the modifier to the numerator: 3分の5 'five that was divided by three' 'five thirds' This ...
9
votes
4answers
475 views

Does 一二三 mean “1 2 3” or “123”?

Is it possible, without any context, to tell whether 一二三 means "one, two, three" or "one hundred twenty-three"? In English, this kind of ambiguity would be removed by adding spaces between each ...
9
votes
3answers
234 views

Are the usage of 上 and 下 as labels only limited to items that come in pairs of two?

I have some untranslated mangas that come in pairs of two, and each of them is labeled with 上 or 下 to denote which is the first volume and which is the second. I'm wondering if these labels are only ...
9
votes
1answer
810 views

Gregorian calendar year to Japanese era name, and vice versa [closed]

Just for fun, I'm curious about how native speakers do mental translation from Gregorian calendar year (e.g 2011) to Japanese era name 年号 (e.g. 平成23年), and vice versa. Do you have special and ...
8
votes
2answers
288 views

When a number is written in western numerals, how do you say them?

Someone has said this in my manga. まず!我らの使命は2つ!! Does he actually say "two" or "に"? If the latter, why not use 二? I don't see 二つ as being any different.
8
votes
2answers
422 views

How to say 24 divided by 8 equals 3

Pretty sure you have to use 割 but I don't know which pronunciation to use and how to say "equals" in this context.
8
votes
2answers
239 views

Confusion about 一千億 and 一千兆

I recently created a web app called Kazu which aims to help speakers of Japanese and English learn to read numbers in both languages. I found a web page which said that 'for numbers over 1万, "1000" ...
8
votes
1answer
401 views

Is there a general counter word for objects that you can fallback on if you're not sure which one to use?

I guess we could use the native Japanese numbers, 一つ, 二つ, 三つ...but we'd run into a problem at or after ten (not sure how とお works — same for はたち). Is there a general counter word that we can fallback ...
8
votes
1answer
178 views

How do you read zeros in abbreviated years? (i.e. 03年)

I came across 03年度 and 09年度, and while the meaning is clear I didn't know the actual way of reading it. My first reaction was ゼロさんねんど, but I have no way of checking if that's right. I thought it might ...
7
votes
2answers
240 views

Reading a number range

I have a bottle of 洗顔料(facial soap), and the instructions are: ご使用量の目安 ポンプ1~2回 (use about 1 to 2 pumps) If I were to read 1~2 aloud, how would I do it?
7
votes
1answer
516 views

How do you do a countdown?

For example, when JAXA launches a rocket, or people count the seconds to the New Year, do they use し or よん to count 4? do they use しち or なな to count 7?
7
votes
2answers
1k views

Is B2F, B1F, 1F, 2F, … wasei-eigo?

While visiting Tokyo, I noticed that most levels were indicated by B2F, B1F, 1F, 2F, ... . This doesn't look like the Romaji for -kai or -gai counter-words, which I assume would be chika ni-kai, ...
7
votes
3answers
245 views

How to read words like テスト with ordinal numbers?

Consider this: テスト1, テスト2, テスト3 etc. (Taken from my exercise books. The tests are labelled as such up to 30) (Question) Should numbers that are used with loanwords like テスト be read with いち, に, ...
7
votes
1answer
190 views

How do you say multiples of some number?

On a specification about a data. The valid value must be multiples of 10 (10, 20, 30, ...) How do you state that in Japanese. I saw on a document that it is written as Xは10,20,30・・のように10飛で付番する ...
7
votes
2answers
259 views

Can counter words also be nouns?

According to people I've asked, and this page, if I pay 20 Australian dollars for my meal, it seems I say ni ju doru (20-ドル), and that ni ju-en doru (20-えん-ドル) would be ungrammatical - "dollar" acts ...
7
votes
2answers
269 views

Do we use odd day pronunciations outside of calendar ranges?

After reading @jkerian's comment in this post, I started thinking about this. Here's the comment in full: On a side note, all days ending in '4' are also irregular, and use ~よっか. So the 14th is ...
6
votes
3answers
966 views

Reading of years

Years (Gregorian) can be read out in English: A – two digits at a time; B – each digit separately; C – full reading of the number. For example: 2012: "Twenty twelve"; "Two ...
6
votes
2answers
1k views

List of Japanese counter words [closed]

What are the essential Japanese counter words? For example -dai for machines, -mai for papers and stuff like that. What else to expect/know? Thank you
6
votes
2answers
191 views

Numbers and Counters

I am still in a very early stage in learning Japanese, and just I have just learnt some numbers and my first counter words, such as the ones for telling time and まい. Do you ever use "regular" numbers ...
6
votes
2answers
213 views

When to read 一人 and 二人 as いちにん and ににん?

WWWJDIC lists いちにん and ににん as alternative readings of 一人 {ひとり} and 二人 {ふたり}, but I can't recall anywhere I heard those readings except when counting more than 10 people for example 三十一人 {さんじゅういちにん}. ...
6
votes
1answer
131 views

Reading of 組 as a Counter Word With Numbers

I'm confused about how to pronounce a word such as 一組. Are Japanese or Chinese numbers used when using 組 as a counter, and if the former how does it change phonetically? For example, jisho.org lists ...
6
votes
2answers
213 views

Prefixing `一` to numbers

It seems to me that 千 is exceptional in having it prefixed with 一. As for 一, 十, 百, they work together with 千 to describe the numbers from 1 to 9999, so they compete with one another, or are ...
5
votes
1answer
408 views

How to say “Episode 22”, “Chapter 22”, “Act 22”, etc?

I just wanted to make sure that my understanding is correct. When saying Chapter 22, Act 22, or Episode 22 (basically parts of a larger piece), it normally starts with 第22 (or 第[number]) and then the ...
5
votes
2answers
162 views

Are ~つ and ~り the only two counters that can occur with the native Japanese numbers (ひと~, ふた~, etc)?

Please go easy on me if this seems too basic and obvious, I'm a beginner. I always had the impression that there were counters that went with the native Japanese numbers and counters that went with ...
4
votes
3answers
208 views

Are kanji typically used in times and dates?

Are kanji typically for numbers used in times and dates? For example, would "七" and "十五" in the first sentence, and "九" and "三" in the second sentence be normal Japanese? (I'm aware that the ...
4
votes
4answers
940 views

Is there a logic behind the different endings when counting things in Japanese

So far I don't see any logic to it. It seems like it's just something you have to memorize, or is there a trick that I'm missing. Update To clarify, I'm not so much questioning the existence of the ...
4
votes
2answers
238 views

What is this 10^40 thing?

While checking out "正" (as in 正坐, specifically) I found that apparently one of the associated meaning would be 10^40 (i.e. 10 elevated at the 40th power). Example -taken from Tangorin.com: sei 【正】 ...
4
votes
2answers
645 views

How is「第3位を四捨五入」deconstructed to mean “round up to 2 decimal places”?

小数第2位未満に端数が生じた場合は、小数第3位を四捨五入する I initially translated this sentence to: If a fraction with less than 2 decimal places is generated, round off to 3 decimal places. So: 2.1 ≈ 2.100 It felt ...
4
votes
2answers
507 views

壱, 弐, 参 vs 一, 二, 三

Can you tell me the difference between 壱 and 一, 弐 and 二, 参 and 三? Do these pairs have the same meaning? If yes, why do we use different Kanji? If no, what is the difference in their meanings? Can ...
4
votes
2answers
363 views

What is the correct syntax for large numbers in kanji?

Say I was trying to write the number 3,476,521,893,421 in kanji. How would I go about this? My guess was 三万四千七百六十五億二千百八十九万三千四百二十一 but it looks really wrong to me because it feels too Western to be ...
4
votes
2answers
694 views

Should I use On reading or Kun reading for numbers?

I've just started to learn Japanese, and I've been looking at the Joyo Kanji. Most of the words have On reading and Kun reading. I was wondering, which one is most popular and when should I use one ...
4
votes
1answer
170 views

In this example, should the number 4 be read し or よん?

Recently, on another question, I left a comment where I said I thought 1・2・3・4 might be pronounced イチニーサンヨン. I was quickly corrected by another user, who said the following: AFAIK, 1,2,3,4 is ...
4
votes
1answer
357 views

Horizontal writing in the middle of vertical writing

My character dictionary is written in vertical style. In this dictionary, columns of text are sometimes divided into two smaller columns, which are read right-then-left. I've read that this is ...