明明後日(しあさって)

Also written in hiragana as しあさって. Composed of し (an intensifying prefix) + 明後日(あさって) (the day after tomorrow). Part of the Japanese temporal sequence:

• 今日(きょう) (today)
• 明日(あした) (tomorrow)
• 明後日(あさって) (day after tomorrow)
• 明明後日(しあさって) (three days from now)

Similar words

• 明後日(あさって) — the day after tomorrow; the preceding day in the sequence
• 明日(あした)/明日(あす) — tomorrow
• 一昨日(おととい) — the day before yesterday

Regional note

In some regions of Japan (particularly parts of Kansai), しあさって means four days from now, while 明明後日(ささって) or やのあさって refers to three days from now. The standard/Tokyo meaning is three days from now. This regional difference can cause confusion, so when precision matters, it is safer to specify the actual date.