Japanese Days of the Week (with Kanji and Meaning)

The seven Japanese days at a glance

Here are the Japanese days of the week, all seven of them, with the kanji you will see on a calendar, the hiragana that spells out the reading, the romaji so you know how to say it, and the element or body each one is named after. Read across each row and you will start to feel the pattern before we even explain it.

Notice the two things every row shares. The last two kanji are always the same, 曜日, read youbi, and the reading always ends in the same "youbi" sound. Only the first kanji changes from day to day, and that first kanji is the element or body the day is named after. So the entire job of learning the days comes down to learning seven single characters and their short readings, then bolting the same suffix onto each. That is a far smaller task than it looks at first, and it is the reason the days are usually one of the earliest wins for anyone starting out with the language.

One quick note on romaji before we go further. You will sometimes see these spelled with a long vowel mark, as in "getsuyōbi," and sometimes doubled, as in "getsuyoubi," which is how the hiragana actually spells it with a う after the よ. Both point at the same sound, a long "oh" in the middle. Throughout this guide the romaji mirrors the kana spelling so you can match each syllable to its character, but if you meet the macron version elsewhere, know that it means the same thing.

The logic: elements and planets

Here is the part that makes the whole week make sense. The Japanese day names come from the seven classical moving objects that old astronomy tracked across the sky: the sun, the moon, and the five planets you can see without a telescope. That is exactly seven, one for each day, and the order was fixed long ago. What makes the Japanese version so tidy is that each of those five planets carries the name of one of the five classical elements used across East Asia.

In that older system the five elements are fire, water, wood, metal, and earth, and the five visible planets were each tied to one of them. So when the seven-day week arrived, the planet names came with their elements attached. Mars is the fire planet, Mercury is the water planet, Jupiter is the wood planet, Venus is the metal or gold planet, and Saturn is the earth planet. Put the sun and moon on either end and you get the seven day names in their meanings: moon, fire, water, wood, metal, earth, sun.

If that sequence rings a faint bell, it should. The same seven-body scheme, sun, moon, and the five planets, shaped the day names in a lot of languages, which is why the structure underneath feels oddly familiar even though the Japanese words share no sound with English. Think about it in English for a second. Sunday is the sun's day, Monday is the moon's day, and Saturday is Saturn's day. Those three still wear their origin plainly. The Japanese days simply keep all seven of them transparent instead of only a few, so the logic is right there on the surface every single day.

This is genuinely useful, not just a fun fact. When a set of words has a story behind it, it is far easier to remember than a flat list, because you can rebuild the whole thing from the pattern instead of dredging up seven separate sounds. If you can name the five elements in the traditional order and remember that the moon opens the working week and the sun closes it, you can reconstruct every day name from scratch. That is a much sturdier kind of memory than rote repetition, and it is why we spend a moment on the meaning of each element below rather than rushing you straight to memorization.

The -youbi suffix, explained

The suffix that ties the whole system together is youbi, written 曜日. It is what turns a plain element word into the name of a weekday. The first of those two kanji, 曜, carries the sense of the days of the week and their old link to the shining bodies in the sky. The second, 日, is the extremely common character for "day" and also for "sun," which is why it shows up again as the element for Sunday. Together they read youbi and mean, in plain terms, "day of the week."

The way it works is simple. Take the kanji for an element on its own and it just means that element. The character 火 by itself is "fire." Attach youbi and it becomes 火曜日, kayoubi, "the fire day," which is Tuesday. The same move works for all seven. 水 is "water," and 水曜日, suiyoubi, is "the water day," Wednesday. Once youbi is in your head, you never have to learn a day name as a whole word again. You only learn which element goes in front.

You will also meet youbi as a word in its own right when someone asks which day it is. The question word "what" combines with it to make nanyoubi, 何曜日, meaning "what day of the week," which we will come back to in a moment. For now, the thing to lock in is that youbi is the fixed part and the element is the moving part. Beginners sometimes try to memorize each day as one long unbroken sound, which makes seven big words to swallow. Split off the shared suffix and you are left with seven tiny pieces, which is a completely different and much lighter load.

There is a small sound change worth flagging so it does not trip you up. The reading of the first kanji sometimes shifts a little to sit smoothly before youbi. Monday uses the "getsu" reading of the moon kanji, Friday uses "kin" for the gold kanji, and Sunday uses "nichi" for the sun kanji. These are ordinary readings of those characters, not oddities you have to fear, and saying the days out loud a few times makes the joins feel natural fast. This is exactly the kind of thing that clicks through the mouth rather than the eyes, which is why we push speaking so hard later on.

Each day, one by one

Now let us walk through the seven days one at a time, with the meaning of each element so the name has something to stick to. Say each one out loud as you read it. Even a whisper counts, because getting your mouth around the sound is what moves a day from something you recognize on a page to something you can actually produce when you need it.

Monday, the moon day

Monday is 月曜日, getsuyoubi, the moon day. The lead kanji 月 means both "moon" and "month," which makes good sense, since a month is roughly one cycle of the moon. Here it takes the reading "getsu." The tie to the moon is easy to hold onto if you lean on the English parallel: Monday is literally the moon's day in English too, buried under centuries of spelling, and in Japanese it is right on the surface. Start of the working week, and the gentle moon opens it.

Tuesday, the fire day

Tuesday is 火曜日, kayoubi, the fire day. The kanji 火 means "fire," and this day is tied to the fire planet, Mars, the red one that looks like a burning ember in the night sky. This is the shortest of the seven day names, just three syllables, ka-yo-u-bi as it is written but crisp when spoken, because the "ka" reading is short. A vivid image of a small fire helps here, and the redness of Mars gives you a second hook if you want one.

Wednesday, the water day

Wednesday is 水曜日, suiyoubi, the water day. The kanji 水 means "water," and the day is linked to the water planet, Mercury. The reading of the water kanji here is "sui," a sound you will meet again in plenty of other water-related words, so it is worth banking. Picture the middle of the week as a flowing stream carrying you from one side to the other, water in the center of things.

Thursday, the wood day

Thursday is 木曜日, mokuyoubi, the wood day. The kanji 木 means "tree" or "wood," and the day belongs to the wood planet, Jupiter, the largest of the visible planets. The reading here is "moku." A tree is an easy thing to picture, and since Thursday sits late in the working week, you can imagine a sturdy tree you are leaning on as the weekend comes into view. Wood is solid and steady, a good feel for the day before the last push.

Friday, the gold or metal day

Friday is 金曜日, kinyoubi, the gold day, sometimes called the metal day. The kanji 金 means "gold," "metal," and by extension "money," and it is tied to the metal planet, Venus, the bright one that shines almost like a coin at dusk or dawn. The reading is "kin." Friday being the gold day is a gift for memory, because the end of the working week really does feel a bit golden, payday and freedom both glinting on the horizon. Let that association do the work for you.

Saturday, the earth day

Saturday is 土曜日, doyoubi, the earth day. The kanji 土 means "earth," "soil," or "ground," and the day is linked to Saturn, the earth planet in this system. Notice the English echo again: Saturday and Saturn sit right next to each other, so the two languages point at the same body from opposite directions. The reading is "do," short and firm. Solid ground under your feet on the first day of the weekend is an easy picture to keep.

Sunday, the sun day

Sunday is 日曜日, nichiyoubi, the sun day. Look closely and you will see the same kanji 日 twice: once at the front as the element, the sun, and once at the end as the "day" in youbi. That doubled character is a tidy little landmark that makes Sunday instantly recognizable on a calendar. The front reading is "nichi." And once more the English lines up exactly, Sunday is the sun's day in both languages, so of all seven this may be the very easiest to lock in.

If reading those kanji felt like a stretch, that is completely normal at this stage, and it is a sign it is worth getting comfortable with the scripts underneath. Our guide to the Japanese writing system walks through hiragana, katakana, and kanji and how the three fit together, which makes calendar words like these far less intimidating once the characters stop looking like a wall.

How to say "on Monday"

Knowing the day names is step one. Using them in a real sentence is where they earn their keep, and the most common thing you will want to say is that something happens on a particular day. In Japanese you do this by adding the small particle に, ni, right after the day. That is the whole trick. On Monday is getsuyoubi ni. On Friday is kinyoubi ni. On Sunday is nichiyoubi ni. The day itself does not change at all, you just tack ni on the end.

The particle ni marks a point in time, the "when" of an action, and it sits after the time word, not before it, which is the reverse of the English "on." So where English puts "on" ahead of "Monday," Japanese puts ni behind getsuyoubi. Here are a few short frames you can reuse with any day:

• getsuyoubi ni means "on Monday." Swap in any other day and the pattern holds: doyoubi ni for "on Saturday," suiyoubi ni for "on Wednesday."
• Day plus ni plus an action gives you a full statement of when something happens. You put the day and its ni near the start, then finish with what you are doing.
• To simply say what day it is, you do not use ni at all. You use the topic particle wa and the polite ending desu, as in kyou wa getsuyoubi desu, "today is Monday."

You will hear people drop the ni in fast, casual speech, especially with friends, and it will still be understood. As a learner, though, keep using it. It is always correct, it never sounds wrong, and it builds the right habit for when you move into more formal situations where leaving it out would stand out. Think of ni as the small screw that fixes a day to a sentence, cheap to include and worth keeping tight.

One more useful pairing. To talk about a range, "from Monday to Friday," you use kara for "from" and made for "to," giving getsuyoubi kara kinyoubi made. That single phrase covers the whole working week and is exactly the kind of ready-made chunk that pays off in conversation, because you can drop it in whole without assembling it under pressure. If you want more building blocks like this, our roundup of common Japanese words for beginners gives you the everyday vocabulary that these day names slot into.

Today, tomorrow, and yesterday

The weekday names tell you which slot in the week you mean, but most of daily life runs on words that shift with the current day: today, tomorrow, yesterday. These do not take the youbi suffix, because they are not fixed weekday names, they are relative time words whose meaning slides forward every midnight. You will use them constantly, so they are worth learning right alongside the days.

Look at the kanji and you will spot the friendly 日 again, the "day" or "sun" character, sitting at the end of all three. Today is 今日, kyou, where the first kanji carries the sense of "now." Tomorrow is 明日, ashita, with a first kanji that means "bright," a nice image of the day dawning ahead. Yesterday is 昨日, kinou, whose first kanji points at the past. You do not need to master those front characters to use the words, the readings kyou, ashita, and kinou are what come out of your mouth, but seeing the shared 日 ties them into the same family as the weekdays.

Now put the two sets together, because that is where they come alive. To say "today is Monday," you say kyou wa getsuyoubi desu. To say "tomorrow is Tuesday," you say ashita wa kayoubi desu. To say "yesterday was Sunday," you say kinou wa nichiyoubi deshita, where deshita is simply the past form of desu. These three sentence frames alone will carry you through an enormous amount of everyday small talk about schedules and plans.

There is a lovely daily drill hiding in here. Every morning, before you touch your phone, say out loud what today is, what tomorrow will be, and what yesterday was, all in Japanese. Kyou wa doyoubi desu, ashita wa nichiyoubi desu, kinou wa kinyoubi deshita. It takes ten seconds, it uses the real words in real sentences about your real life, and it quietly cements both the weekdays and the relative time words at the same time. Small habits like this beat long study sessions precisely because they repeat, day after day, right when the information matters.

Asking what day it is

Sooner or later you will want to ask which day it is, or find out which day something falls on, and the question is refreshingly simple. The word for "what day of the week" is nanyoubi, 何曜日, built from the question word nani or nan, meaning "what," plus the youbi suffix you already know. It is the same youbi doing the same job, just attached to "what" instead of an element.

The most common form of the question is kyou wa nanyoubi desu ka, which means "what day is it today." Break it down and every piece is one you have already met: kyou is today, wa is the topic particle, nanyoubi is "what day of the week," desu is the polite ending, and ka is the little question marker that turns a statement into a question. Answering is just as easy, you replace nanyoubi with the actual day: kyou wa mokuyoubi desu, "today is Thursday."

You can swap kyou for any time word to ask about other days. Ashita wa nanyoubi desu ka asks "what day is tomorrow." You could ask which day a birthday or a holiday lands on the same way. The pattern is stable, so once you own this one question you own a whole family of them. Practice it as a pair, the question and a real answer, rather than in isolation, because in the wild these always come together and your ear needs to expect the reply.

This is also a perfect thing to rehearse with a partner who can answer back, since a question with no response only trains half the exchange. Ask the question out loud, hear a real day come back, and answer the next one yourself. That back-and-forth is exactly the pressure that turns a memorized phrase into something you can actually use, and it is worth seeking out rather than drilling the question alone. If numbers tend to come up in the same breath as days, for dates and times, our guide to Japanese numbers and counters covers the counting side so your calendar talk is complete.

Memory tips that actually work

The days are a small set with a strong pattern, which makes them ideal for a few targeted memory tricks. The goal is not to grind the list a hundred times, it is to give each day a hook so solid that you can rebuild the whole week from the logic. Here are the approaches that pay off most.

• Learn the elements in order first. Moon, fire, water, wood, gold, earth, sun. Say that sequence until it flows, because it is the backbone of the whole week. Once the order of elements is automatic, every day name is just that element plus youbi, and you can produce all seven from the single chain.
• Lean hard on the three English bridges. Monday is the moon day, Saturday sits by Saturn as the earth day, Sunday is the sun day. Those three come almost free because English already carries the same origins, so nail them first and you only have four genuinely new ones left.
• Give each element a vivid picture. A small fire for Tuesday, a flowing stream for Wednesday, a tall tree for Thursday, a gold coin for Friday. Concrete images stick far better than abstract sounds, and the more specific and personal the picture, the stronger the hook.
• Use the doubled sun kanji as a landmark. Sunday, 日曜日, is the only day with the same character at both ends. Spotting that repeated shape gives you an instant anchor when you scan a calendar or a schedule.
• Group Friday's gold with the feeling of Friday. The end of the working week really can feel golden, so let that emotional association carry kinyoubi for you. Tying a word to a feeling you already have is one of the most reliable memory moves there is.

Beyond these hooks, the single most powerful tool is spacing your reviews out over time instead of cramming them into one sitting. Seven days learned in a burst tonight will be foggy by the weekend, but the same seven touched briefly today, tomorrow, in a few days, and next week will stay for good. If you want the full method behind that, our guide on what spaced repetition is explains exactly why reviewing right before you would forget beats hammering the list all at once. Pair that spacing with the element logic above and the days become close to unforgettable.

One caution on memory tricks. They are scaffolding, not the building. A vivid image gets a word into your head, but it does not by itself let you say the word fast in a live conversation. At some point you have to let go of the mental picture and just produce the sound directly, and the only way there is repetition out loud. So use every hook that helps, then deliberately practice saying the days without pausing to summon the picture, until the word comes on its own.

Practice out loud

Here is the honest truth about the days of the week, or any vocabulary. Being able to read getsuyoubi off a page is not the same as being able to say it in the middle of a sentence, on the spot, while you are also thinking about what you actually want to communicate. Those are two different skills, and flashcards only build the first one. The gap between recognizing a word and producing it under real pressure is where a lot of learners quietly get stuck, sitting on a pile of words they can read but cannot speak.

The way across that gap is to practice the days out loud, in real sentences, over and over, until the sounds come without effort. A few concrete drills that work well:

• The morning three. Every morning, say aloud what today is, what tomorrow will be, and what yesterday was. Kyou wa doyoubi desu, ashita wa nichiyoubi desu, kinou wa kinyoubi deshita. Ten seconds, real sentences, every day.
• The week chant. Run the seven days in order, out loud, quickly, from getsuyoubi to nichiyoubi, until you can do it without a stumble. Then run it backwards. Speed and smoothness are the goal, not just accuracy.
• Schedule sentences. Describe your real week out loud. On Monday I work, getsuyoubi ni hatarakimasu. On Sunday I rest. Using the days to talk about your own actual plans makes them meaningful and memorable in a way that isolated words never manage.
• Question and answer. Ask yourself kyou wa nanyoubi desu ka and answer it aloud with the real day. Then ask about tomorrow. Training both halves of the exchange is what prepares you for a real conversation.

The catch with speaking practice is that it usually needs a partner, and a patient one who will let you fumble through the days at your own pace is not always sitting next to you at seven in the morning. That is exactly the gap an AI speaking partner fills. It is there whenever you are, it never gets bored of hearing you say the days again, and it lets you practice asking and answering "what day is it" out loud, with real replies coming back, without any worry about being judged. Speaking to something that responds is what turns a memorized list into words you can genuinely use, which is the whole reason we build what we build. You can see how it works on our pricing page.

Common mistakes to avoid

The days are simple, which is exactly why a few small errors tend to creep in and stick. Catching them early saves you from drilling a mistake into a habit. Here are the ones that come up most.

1. Mixing up Tuesday and Saturday. Kayoubi, the fire day, and doyoubi, the earth day, are both short and can blur together for beginners. Keep them apart with their elements: ka for fire, a small flame, and do for earth, solid ground. Anchor each to its picture and the confusion clears.
2. Forgetting the sound shifts before youbi. The moon kanji reads "getsu" in getsuyoubi, the gold kanji reads "kin" in kinyoubi, and the sun kanji reads "nichi" in nichiyoubi. These are normal readings, not errors, so say the full day names out loud until the joins feel natural rather than trying to force a single reading everywhere.
3. Putting ni in the wrong place, or on the wrong words. The time particle ni comes after the day, getsuyoubi ni, not before it. And you do not use ni with kyou, ashita, or kinou, which stand on their own, so "today" is just kyou, never kyou ni in normal speech.
4. Treating today, tomorrow, and yesterday as weekdays. Kyou, ashita, and kinou do not take youbi and are not part of the seven-day set. They shift with the current day. Keep the two groups separate in your mind, fixed weekday names on one side, relative time words on the other.
5. Only ever recognizing, never producing. The biggest one. It is easy to nod along to a chart and feel like you know the days, then freeze when you actually have to say Thursday in a sentence. Recognition is not production. From the start, say every day out loud and use them in real sentences, so you are training the skill you actually need.

None of these are hard to fix, and every one of them fixes itself faster when you practice speaking rather than only reading. A mistake you make out loud, hear, and correct in the moment sticks corrected. A mistake you only ever meet silently on a page tends to survive. That is one more reason to get your voice involved from day one instead of saving speaking for "later."

How SPAIKING fits in

Learning the seven days from a chart is the easy half. The hard half, the half that actually lets you use them, is producing the words out loud in real conversation, fast enough to keep up, and that is the exact gap SPAIKING is built to close. You learn the days and their logic here, then you open SPAIKING and turn them into speech with an AI partner that talks back.

Here is how it fits together. After you have the days in your head, you have a spoken conversation with the AI, deliberately reaching for the weekdays as you talk about your schedule, your plans, what today is, what you did yesterday. Because the AI actually responds, you get the two-way pressure a flashcard can never give you, an unexpected reply you have to understand and answer on the spot. That pressure is precisely what drags a word like mokuyoubi from "I recognize it on a chart" to "I can say it in a sentence." And because it corrects your pronunciation as you go, you find out in the moment which day names you can produce cleanly and which ones still trip you up.

• It is always available. No scheduling a partner, no waiting for a class. Learn the days, then practice saying them seconds later, whenever you have a spare few minutes.
• It is judgment-free. You can stumble over kinyoubi ten times and the AI just keeps the conversation going, which is what finally gets nervous learners to speak out loud instead of hiding in more reading.
• It corrects you in real time. Your own ear forgives your own mistakes, so you miss them. Live correction points you straight at the sound that needs fixing before it hardens into a habit.
• It builds the real skill. Charts build recognition. Conversation builds production. Only production lets you drop the right day into a real sentence when the moment comes.

Think of it as the second half of the loop. Reading and charts are the first half, the part you can do anywhere, that gets the days into your head. Speaking is the half that is harder to arrange and easier to avoid, and it is the half that actually makes you able to talk. Put them together, learn a small set like the days and then say them out loud in real conversation, and you close the gap that leaves so many learners understanding a language they still cannot speak. You can start on the pricing page or head back to the SPAIKING home page to see the whole picture, and begin turning the seven days into real Japanese you can actually say.