十とお日か

と

お

か

Common wordJLPTN5

Meanings

1

10th day of the month

Used for the tenth day of any month. Common in dates, appointments, and deadlines.

会かい議ぎは１０日かに行おこなわれます。
The meeting will be held on the 10th.
来らい月げつの十とお日かは金きん曜よう日びです。
The 10th of next month is a Friday.

2

ten days

Refers to a period of ten days. Often used with counters or in expressions like 十日間.

この仕し事ごとは十とお日かかかる。
This work takes ten days.
十とお日か間かんの旅りょ行こうを計けい画かくしている。
I'm planning a ten-day trip.

See all 33 example sentences ›

Usage patterns

〈月つき〉十とお日かにon the 10th of (a given month)
会かい議ぎは五ご月がつ十とお日かに行おこなわれる。
The meeting will be held on May 10th.
十とお日かほど〈動どう詞し〉to do something for about ten days
十とお日かほど旅りょ行こうに行いくつもりです。
I plan to travel for about ten days.
十とお日か前まえにten days ago
十とお日か前まえに手て紙がみを送おくりました。
I sent the letter ten days ago.
十とお日か後ごにten days later / in ten days
十とお日か後ごにまた連れん絡らくします。
I'll contact you again in ten days.

Kanji

日day, sun, Japan
十ten
一one, one radical (no.1)

Don't confuse with

二十日はつかN5
十日 (とおか) is the irregular reading for 'the 10th day/ten days', and 二十日 (はつか) is the similarly irregular reading for 'the 20th day/twenty days', so learners often mix up which special kun-reading goes with which number.
一日ついたちN5
十日 (とおか) and 一日 (ついたち) are both irregular native-Japanese readings used for dates, and beginners often confuse which day each one refers to.

Written forms

十とお日か
Standard kanji spelling, preferred in general writing.
１０とお日か
Common in dates, schedules, and numeric contexts.
一〇日とおか
Uncommon variant using 〇; mainly seen in vertical writing or legal documents.

Etymology

Combination of 十 (ten) and 日 (day), with the reading とおか derived from the native Japanese counting system.