If you agree to meet “shiasatte,” will you arrive on the same day?
You hear the same Japanese word, yet mark different days on your calendars. Dialect records help reveal a misunderstanding hidden inside an apparently clear arrangement.
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Records show regional differences in the day referred to by shiasatte. Distinguishing a word’s use from its meaning, and checking the actual date when making plans, can help prevent crossed wires.
A small arrangement made on a Monday
Suppose today is Monday. If someone says, “Let’s meet shiasatte,” which page of your diary would you open? Three days later would be Thursday; four days later would be Friday. A disagreement need not be a simple counting mistake. An explanation from Japan’s National Institute for Japanese Language and Linguistics records cases in which shiasatte and yanoasatte referred to different days in neighboring regions. Because the words are familiar, a conversation may continue without either person checking the meaning. Put the two calendars in their heads side by side for a moment. A small gap appears between sharing a word and sharing a plan.
Word comparison desk
Where does shiasatte fall on the calendar under the two naming patterns?
Align the number of days after “today” and compare two sets of names in stacked rows. This does not classify regions or individual speakers.
If today is Monday in this example
AShiasatte means 3 days ahead
- TodayMondayToday
- 1 day laterTuesdayTomorrow
- 2 days laterWednesdayThe day after tomorrow
- 3 days laterThursdayShiasatte
- 4 days laterFridayYanoasatte
BShiasatte means 4 days ahead
- TodayMondayToday
- 1 day laterTuesdayTomorrow
- 2 days laterWednesdayThe day after tomorrow
- 3 days laterThursdayYanoasatte
- 4 days laterFridayShiasatte
The same word, shiasatte, points to Thursday in example A and Friday in example B. The dates differ by 1 day.
This illustrative example is separate from the actual current day or your plans. When making arrangements, adding a specific month and day lets you check that you mean the same date.
The labels for three days ahead and four days ahead trade places
One historical pattern described in the source used yanoasatte for three days ahead and shiasatte for four days ahead in the Kanto region; in Tokyo’s 23 wards, these two were in the opposite order. Our diagram places naming examples A and B side by side. In A, shiasatte means three days ahead; in B, it means four. The same label moves to the next day. Both patterns still proceed through today, tomorrow, and the day after tomorrow. What differs is which word is attached to each of the following two days. This compares recorded correspondences; it is not a table that determines how present-day residents speak merely from their location.
Follow the word, or follow the day
Now read down the columns of the two-row comparison. In the Thursday column, A has shiasatte and B has yanoasatte. Holding the day constant reveals the difference in names. Follow just the shiasatte label instead, and it lands on Thursday in one row and Friday in the other. Holding the word constant reveals a difference in the day it refers to. The relationship stays the same if you choose a different weekday as “today.” Because this example is independent of the actual current day, you do not need to recall your own schedule. It is a chance to practice checking what a word refers to before feeling reassured simply because its written form matches.
Open a map of language
The Linguistic Atlas of Japan is one resource for tracing such differences. It maps where word forms and pronunciations occur, item by item. Volume 6, published in 1974, contains map 285, “Shiasatte (three days after today),” and map 286, “Yanoasatte (four days after today).” These headings name the items being investigated; they do not mean that everyone in every location answered with that word form. When opening the original material, move from the heading to the legend to see which words its symbols represent. Beyond looking for a single correct answer, there is interest in surveying the different names people used for the same thing.
Before reading a number, read the question
Consider another source: the 2012 survey of university students in the Tokyo metropolitan area. It surveyed about 700 students at universities located in Tokyo and Saitama, recording responses about whether they used yanoasatte, had heard it, or did not hear it used. You might want to know what proportion meant three days ahead, but these results cannot supply that number. The researchers explicitly state that this question did not ask about meaning. The number of people who use a word is not the same as the number who use it with a particular meaning. Reading the numbers together with the question makes clear what the source can tell us. This survey also does not represent people of all ages throughout Japan today.
Add a date to the word
With someone you know, you could begin by asking, “How many days ahead do you mean by shiasatte?” If their answer differs from yours, ask when and with whom they use the word before asking them to rephrase it. Treat their answer as one person’s usage, without extending it to an entire region. When making an actual arrangement, you can add the date: “Shiasatte—the afternoon of [month and day].” This is a suggestion for checking the meeting day. Taking an interest in language differences and making sure your plans match can go together. A few squares on a calendar can start a conversation about what each of you takes for granted.
Sources and verification notes
This article is an original synthesis of primary sources and explanations from specialist institutions.
Generative AI assists with research, structure and English translation. Claims are compared with sources and editorial checks are performed; independent specialist and native-English reviews have not yet been completed.
- National Institute for Japanese Language and LinguisticsRegional differences in language use and language attitudes among university students in the Tokyo metropolitan area: 2012 edition, item 32 ↗ (opens in a new tab)
- National Institute for Japanese Language and LinguisticsRegional differences in language use and language attitudes among university students in the Tokyo metropolitan area: survey overview ↗ (opens in a new tab)
- National Institute for Japanese Language and LinguisticsLinguistic Atlas of Japan, map 285: “Shiasatte (three days after today)”—source information ↗ (opens in a new tab)
- National Institute for Japanese Language and LinguisticsLinguistic Atlas of Japan, map 286: “Yanoasatte (four days after today)”—source information ↗ (opens in a new tab)
- National Institute for Japanese Language and LinguisticsLinguistic Atlas of Japan: map images and guide to the materials ↗ (opens in a new tab)
Sources checked:
We checked the commentary on item 32 and the survey overview for NINJAL’s 2012 survey, together with the bibliographic records for maps 285 and 286 of the Linguistic Atlas of Japan. Our comparison of the two naming patterns is based on that commentary. It does not measure present-day nationwide distributions or usage rates by age, and it does not turn answers about experience of using a word in the 2012 question into answers about its meaning. We do not claim to have independently tallied every response from every location on the maps. We have not treated the 2012 commentary’s discussion of semantic change as a new causal study or as a measurement of the present rate of change.
Rights, status, and revision history
- Status
- Free public edition. Preparation and revision history is retained below.
- 0.1.0
- Rights to the text and diagrams
- The original Japanese text is an independently written summary. The SVG illustrations and conceptual diagrams were newly created. No external images, original source text, or audio recordings are reproduced.
- How sources are used
- Sources are referenced by links only. All rights to each source remain with its respective rights holders.
- · v0.1.0 — Checked primary sources and explanations from specialist institutions, and prepared a private preview article with a guiding question, comparisons, conditions, and references. Added an original explanatory exhibit. Publication has not been approved.
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