Make it ~ / Decide on ~ / Change to ~ – Very useful change expressions
JLPT N5 文法 ～くします / ～にします 解説
Master ～くします / ～にします in 5 minutes. This guide gives you real JLPT N5 examples, the most common mistakes, and practice questions you'll definitely see on the exam.
🚀 Quick JLPT N5 Warm-up Quiz (Think 5 seconds!)
Q1: You want to say “Make the room clean.” How do you say it? A. 部屋をきれいです B. 部屋をきれいにします
Answer: B (きれい is a な-adjective → きれいにします)
Quick Summary
Grammar Point ～くします / ～にします
Meaning Make it ~ / Decide on ~
Usage い-adj: drop い → くします な-adj & noun: add にします
Example 部屋をきれいにします。へやをきれいにします。Heya o kirei ni shimasu. I'll make the room clean.
💡 Switch to Hiragana only or Rōmaji if you're just starting out.
What does ～くします / ～にします mean?
These are very useful JLPT N5 patterns to express intentional change or a decision.
～くします → used with い-adjectives (drop い, add くします). 例：明るい → 明るくしますれい：あかるい → あかるくしますrei: akarui → akaruku shimasu (make it bright)
～にします → used with な-adjectives and nouns (add にします directly). 例：きれい → きれいにします / コーヒー → コーヒーにしますれい：きれい → きれいにします / コーヒー → コーヒーにしますrei: kirei → kirei ni shimasu / kōhī → kōhī ni shimasu
日常会話ではよく使われる表現です。にちじょうかいわではよくつかわれるひょうげんです。Nichijō kaiwa de wa yoku tsukawareru hyōgen desu.
This grammar builds on your knowledge of い-adjectives and な-adjectives. Learn it properly with Anup Sensei at Gogaku Language & Training Center in Pokhara.
How to Pronounce
～くします： ku shi masu
～にします： ni shi masu
きれいにします / 静かにします / 明るくします
Examples & Mini Dialogue
部屋をきれいにします。へやをきれいにします。Heya o kirei ni shimasu.
I'll make the room clean. (な-adj: きれい)
Used when tidying up. The な-adjective きれい takes にします.
音量を大きくします。おんりょうをおおきくします。Onryō o ōkiku shimasu.
I'll turn up the volume / make it loud. (い-adj: 大きい)
Used with devices. The い-adjective 大きい drops い → 大きくします.
コーヒーにします。コーヒーにします。Kōhī ni shimasu.
I'll have coffee. (noun: コーヒー / decision)
Used when ordering. The noun コーヒー takes にします.
静かにします。しずかにします。Shizuka ni shimasu.
I'll be quiet. (な-adj: 静か)
Used as a promise. The な-adjective 静か takes にします.
部屋を明るくします。へやをあかるくします。Heya o akaruku shimasu.
I'll make the room bright. (い-adj: 明るい)
The い-adjective 明るい drops い → 明るくします.
🗣️ Mini Dialogue
A: 何にしますか？なんにしますか？Nani ni shimasu ka?
B: 紅茶にします。こうちゃにします。Kōcha ni shimasu.
(At a café: "What will you have?" — "I'll have tea.")
When to Use in Real Japan
Ordering at restaurants:コーヒーにします / ランチセットにしますコーヒーにします / ランチセットにしますKōhī ni shimasu / ranchi setto ni shimasu
Cleaning or organizing:部屋をきれいにします / 机の上をきれいにしますへやをきれいにします / つくえのうえをきれいにしますHeya o kirei ni shimasu / tsukue no ue o kirei ni shimasu
Changing settings:音量を大きくします / 画面を明るくしますおんりょうをおおきくします / がめんをあかるくしますOnryō o ōkiku shimasu / gamen o akaruku shimasu
Making decisions:これにしますこれにしますKore ni shimasu (I'll take this one)
Promising to behave:静かにしますしずかにしますShizuka ni shimasu (I'll be quiet)
⚡ ～にします vs ～になります — What's the Difference?
A common N5 confusion: when to use にします (make it / decide) and になります (it becomes). The key is whether you are causing the change or it happens naturally.
Pattern
Meaning
Example
にします
Someone makes it / decides
コーヒーにします。 I'll have coffee. (choice)
になります
It becomes (natural/result)
コーヒーがさめました → さめたコーヒーになります The coffee got cold. (result)
💡 Exam tip: If you see a person making a decision or an action → にします.
Common Mistakes
✕部屋をきれいしますへやをきれいしますHeya o kirei shimasu
✓部屋をきれいにしますへやをきれいにしますHeya o kirei ni shimasu
(きれい is a な-adjective → needs に)
🔍 Why this mistake? Learners see “い” at the end of きれい and wrongly apply the い‑adjective rule. Always check: きれい is a な‑adjective despite the ending.
✕静かくしますしずかくしますShizukaku shimasu
✓静かにしますしずかにしますShizuka ni shimasu
(静か is a な-adjective, NOT an い-adjective → use に)
🔍 Many students over‑generalize the ～くします pattern. Remember: only true い‑adjectives take く; な‑adjectives always take に.
✕大きいにしますおおきいにしますŌkii ni shimasu
✓大きくしますおおきくしますŌkiku shimasu
(大きい is an い-adjective → drop い, add くします)
🔍 The opposite error: using に for a true い‑adjective. Make sure you know which adjectives are い‑type (usually end in い, but verify).
🎌 JLPT N5 Exam Trick
In the listening section, pay close attention to the sound right before します:
If you hear a 「く」 sound (e.g., 大きくします) → it's an い-adjective change.
If you hear a 「に」 sound (e.g., 静かにします, コーヒーにします) → it's a な-adjective or a noun/choice.
Many N5 questions test exactly this difference — knowing your い vs. な adjectives is the key!
👉 Quick check: きれい ends in い but is a な-adjective (exception!). Always double-check adjective type.
JLPT N5 Practice Questions
1. "I'll make the room bright."
(明るいあかるいakarui = bright, い-adj)
A. 部屋を明るくします。へやをあかるくします。Heya o akaruku shimasu.
B. 部屋を明るいにします。へやをあかるいにします。Heya o akarui ni shimasu.
Show AnswerCorrect: A (drop い → 明るくします)
2. "I'll have tea."
(紅茶こうちゃkōcha = tea, noun)
A. 紅茶くします。こうちゃくします。Kōchaku shimasu.
B. 紅茶にします。こうちゃにします。Kōcha ni shimasu.
Show AnswerCorrect: B (noun + にします)
3. Choose the correct sentence.
(大きいおおきいōkii = big, い-adj)
A. 大きくします。おおきくします。Ōkiku shimasu.
B. 大きにします。おおきにします。Ōki ni shimasu.
Show AnswerCorrect: A (大きい → 大きくします)
4. "I'll be quiet."
(静かしずかshizuka = quiet, な-adj)
A. 静かくします。しずかくします。Shizukaku shimasu.
B. 静かにします。しずかにします。Shizuka ni shimasu.
Show AnswerCorrect: B (な-adj + にします)
⚠️ Don't miss these easy N5 grammar points — test your level before the exam.
This lesson is taught by Anup Sensei, an experienced Japanese language instructor at Gogaku Language & Training Center in Pokhara. He has studied and worked in Japan and specializes in practical JLPT preparation and real-life communication skills.
Contains information related to marketing campaigns of the user. These are shared with Google AdWords / Google Ads when the Google Ads and Google Analytics accounts are linked together.
90 days
__utma
ID used to identify users and sessions
2 years after last activity
__utmt
Used to monitor number of Google Analytics server requests
10 minutes
__utmb
Used to distinguish new sessions and visits. This cookie is set when the GA.js javascript library is loaded and there is no existing __utmb cookie. The cookie is updated every time data is sent to the Google Analytics server.
30 minutes after last activity
__utmc
Used only with old Urchin versions of Google Analytics and not with GA.js. Was used to distinguish between new sessions and visits at the end of a session.
End of session (browser)
__utmz
Contains information about the traffic source or campaign that directed user to the website. The cookie is set when the GA.js javascript is loaded and updated when data is sent to the Google Anaytics server
6 months after last activity
__utmv
Contains custom information set by the web developer via the _setCustomVar method in Google Analytics. This cookie is updated every time new data is sent to the Google Analytics server.
2 years after last activity
__utmx
Used to determine whether a user is included in an A / B or Multivariate test.
18 months
_ga
ID used to identify users
2 years
_gali
Used by Google Analytics to determine which links on a page are being clicked
30 seconds
_ga_
ID used to identify users
2 years
_gid
ID used to identify users for 24 hours after last activity
24 hours
_gat
Used to monitor number of Google Analytics server requests when using Google Tag Manager
1 minute
Clarity is a web analytics service that tracks and reports website traffic.
Registers a unique ID on mobile devices to enable tracking based on geographical GPS location.
1 day
VISITOR_INFO1_LIVE
Tries to estimate the users' bandwidth on pages with integrated YouTube videos. Also used for marketing
179 days
PREF
This cookie stores your preferences and other information, in particular preferred language, how many search results you wish to be shown on your page, and whether or not you wish to have Google’s SafeSearch filter turned on.
10 years from set/ update
YSC
Registers a unique ID to keep statistics of what videos from YouTube the user has seen.
Session
DEVICE_INFO
Used to detect if the visitor has accepted the marketing category in the cookie banner. This cookie is necessary for GDPR-compliance of the website.
179 days
LOGIN_INFO
This cookie is used to play YouTube videos embedded on the website.
