Doing in advance with

Grammar: Time and Sequence » 〜ておく

〜ておく describes an action performed now to prepare for a later need or preserve a useful result. It attaches おく to a verb’s て form and may contract to 〜とく or 〜どく in speech.

Alternate Explanations

The て form of a verb, followed by the verb おく or おきます (“put”), expresses an action done deliberately for a future convenience. Here, おく or おきます is used as an auxiliary and is conventionally written in hiragana, not kanji.

Kamiya, Taeko. “Actions: in Progress, Completed, Successive, Simultaneous, and Miscellaneous.” Japanese Sentence Patterns for Effective Communication, Kodansha, 2005, p. 113

V て + おく “do something in advance”

V て + おく expresses an action which is performed in advance for future convenience. The verb おく (put) is used as an auxiliary.

Kamiya, Takeo. “Usage of Verb Forms.” The Handbook of Japanese Verbs, Kodansha, 2001, p. 171

N は V おきます。

N does V beforehand.

This pattern provides a means of saying a certain action (て form verb) is done in preparation for an upcoming event: e.g. putting the beer in the refrigerator in preparation for a party, or putting the papers for a meeting on the director’s desk so that he can go over them prior to the meeting. “To do something beforehand” is represented by おきます.

Chino, Naoko. “Basic Pattern 41.” A Dictionary of Basic Japanese Sentence Patterns, Kodansha, 2000, p. 237

Doing Something in Advance

When the て form is followed by the verb おく, the meaning is to do something in advance or as preparation for something else; it can also mean to put away or preserve for later use.

Chino, Naoko. “Expressing Time Relationships.” Japanese Verbs at a Glance, Kodansha, 2000, pp. 95–96

do something in advance for future convenience

おく as a main verb means “put” or “place”. However, when it is used with V て, it is an auxiliary verb meaning “to do something in advance and leave the resultant state as it is for future convenience”.

With a causative verb, V て おく can express the idea that someone lets someone or something remain in his / its present state.

V て おく may be contracted into とく or どく in informal conversation.

Makino, Seiichi and Michio Tsutsui. “Main Entries.” A Dictionary of Basic Japanese Grammar, The Japan Times Ltd., 1989, pp. 357–358

Further Reading

Examples

A saved-up story with 〜ておく

Manga panel from ご注文はうさぎですか? showing example of A saved-up story with 〜ておく.
ご注文はうさぎですか? » Volume 1 » Page 73

A sleep-over at Chino’s place turns into a late-night scary story-telling session.

千夜(ちや):
「とっておきの話(はなし)があるの」
“I have a special story in reserve.”
「切(き)り裂(さ)きラビットっていう実話(じつわ)なんだけど…」
“It's a true story called The Slasher Rabbit...”
シャロ:
「雷(かみなり)!?」
“Lightning!?”

Choosing a menu item with 〜ておく

Manga panel from ご注文はうさぎですか? showing example of Choosing a menu item with 〜ておく.
ご注文はうさぎですか? » Volume 1 » Page 63

After a misunderstanding brings Rize and her friends to the teahouse where Syaro works, the group stays to have some tea.

リゼ:
「ハーブティーの種類(しゅるい)ってよく分(わ)からないな」
“I don't really know the different kinds of herbal tea.”
「適当(てきとう)に選(えら)んどくか」
“Shall I just pick something at random in advance?”

Clearing out a room with 〜ておく

Manga panel from ご注文はうさぎですか? showing example of Clearing out a room with 〜ておく.
ご注文はうさぎですか? » Volume 1 » Page 50

After Cocoa suggests if she were saying at Chiya’s place rather than Chino’s, that she’s be working for Chiya’s family’s tea house, Chiya takes to the idea.

千夜(ちや):
「じゃあ部屋(へや)を空(あ)けておくから早速(さっそく)荷物(にもつ)をまとめて来(き)てね」
“Then I'll clear out a room in advance, so go gather your things and come right away.”
ココア:
「誰(だれ)か止(と)めてよ!」
“Somebody stop her!”

Supplemental Examples

Try finding this grammar in the following examples: