🔢 Numbers: 100-99,999
Now that you know the basics of Japanese numbers up to 99, let's expand your knowledge to handle hundreds, thousands, and ten-thousands! Japanese uses a logical, pattern-based system for large numbers, but there are important pronunciation changes and cultural differences to master.
Core Building Blocks: ひゃく・せん・まん
Japanese large numbers are built from three main units. Understanding these core building blocks is essential for constructing any number up to 99,999.
ひゃく (100)
- • Base unit for hundreds
- • Combines with 1-9 to make 100-900
- • Has sound changes with 3, 6, 8
- • Essential for all larger numbers
せん (1,000)
- • Base unit for thousands
- • Combines with 1-9 to make 1,000-9,000
- • Has sound changes with 3, 8
- • Used within まん groupings
まん (10,000)
- • Base unit for ten-thousands
- • Japan's primary large number unit
- • No sound changes
- • Equivalent to Western "ten thousand"
💡 Construction Pattern:
Large numbers are built by combining these units: [number] + [unit]. For example, 5,000 = ごせん (go + sen), 30,000 = さんまん (san + man).
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Complete Guide to Hundreds (100-900)
The hundreds follow a clear pattern, but watch out for the important sound changes that make pronunciation flow more naturally. These changes follow Japanese phonetic rules.
| Number | Japanese | Romaji | Pattern Note | Audio |
|---|---|---|---|---|
| 100 | ひゃく | hyaku | Base form | |
| 200 | にひゃく | nihyaku | に + ひゃく | |
| 300 | さんびゃく | sanbyaku | ⚠️ Sound change: h → b | |
| 400 | よんひゃく | yonhyaku | よん + ひゃく | |
| 500 | ごひゃく | gohyaku | ご + ひゃく | |
| 600 | ろっぴゃく | roppyaku | ⚠️ Sound change: roku → rop, h → p | |
| 700 | ななひゃく | nanahyaku | なな + ひゃく | |
| 800 | はっぴゃく | happyaku | ⚠️ Sound change: hachi → hap, h → p | |
| 900 | きゅうひゃく | kyuuhyaku | きゅう + ひゃく |
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Complete Guide to Thousands (1,000-9,000)
Thousands follow a similar pattern to hundreds, with fewer but still important sound changes. The key changes occur with 3 and 8, following the same phonetic principles.
| Number | Japanese | Romaji | Pattern Note | Audio |
|---|---|---|---|---|
| 1,000 | せん | sen | Base form | |
| 2,000 | にせん | nisen | に + せん | |
| 3,000 | さんぜん | sanzen | ⚠️ Sound change: s → z | |
| 4,000 | よんせん | yonsen | よん + せん | |
| 5,000 | ごせん | gosen | ご + せん | |
| 6,000 | ろくせん | rokusen | ろく + せん | |
| 7,000 | ななせん | nanasen | なな + せん | |
| 8,000 | はっせん | hassen | ⚠️ Sound change: hachi → has, s → s | |
| 9,000 | きゅうせん | kyuusen | きゅう + せん |
💡 Memory Tip for Sound Changes:
The sound changes follow consistent rules: さん makes "h" sounds become "b/z",はち shortens to はっ and makes following sounds double. These aren't random - they make pronunciation easier!
The まん System: Thinking in Ten-Thousands
This is where Japanese numbers become fundamentally different from English. While English groups by thousands (1,000 → 1,000,000), Japanese groups by ten-thousands. This affects how Japanese people think about and express large numbers.
🇺🇸 English Grouping (by 1,000s):
- • 1,000 = one thousand
- • 10,000 = ten thousand
- • 100,000 = one hundred thousand
- • 1,000,000 = one million
🇯🇵 Japanese Grouping (by 10,000s):
- • 1,000 = せん
- • 10,000 = いちまん
- • 100,000 = じゅうまん
- • 1,000,000 = ひゃくまん
📊 Ten-Thousands Chart:
| Number | Japanese | Romaji | Breakdown | Audio |
|---|---|---|---|---|
| 10,000 | いちまん | ichiman | 1 × 10,000 | |
| 20,000 | にまん | niman | 2 × 10,000 | |
| 50,000 | ごまん | goman | 5 × 10,000 | |
| 90,000 | きゅうまん | kyuuman | 9 × 10,000 |
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Building Complex Numbers: The Complete System
Now let's put it all together! Japanese numbers are built systematically from largest to smallest unit. The pattern is always: まん place + せん place + ひゃく place + じゅう place + いち place.
🏗️ Construction Formula:
[Xまん] + [Yせん] + [Zひゃく] + [Wじゅう] + [V]
Each bracket represents a place value. You only include the parts you need!
📝 Step-by-Step Construction Examples:
| Number | Breakdown | Japanese | Audio |
|---|---|---|---|
| 123 | 100 + 20 + 3 | ひゃくにじゅうさん | |
| 1,234 | 1,000 + 200 + 30 + 4 | せんにひゃくさんじゅうよん | |
| 12,345 | 10,000 + 2,000 + 300 + 40 + 5 | いちまんにせんさんびゃくよんじゅうご | |
| 56,789 | 50,000 + 6,000 + 700 + 80 + 9 | ごまんろくせんななひゃくはちじゅうきゅう | |
| 98,765 | 90,000 + 8,000 + 700 + 60 + 5 | きゅうまんはっせんななひゃくろくじゅうご |
✅ Construction Tips:
- • Start with the largest unit (まん)
- • Work your way down to smaller units
- • Skip units that are zero
- • Remember the sound changes
- • Practice saying long numbers slowly at first
⚠️ Common Mistakes:
- • Forgetting sound changes (300 ≠ さんひゃく)
- • Using English grouping patterns
- • Saying いち before まん unnecessarily
- • Mixing up thousands and ten-thousands
Real-World Usage: Money, Population & More
Large numbers appear constantly in daily Japanese life. Here's how you'll encounter and use these numbers in real situations, from shopping to discussing current events.
💰 Money & Prices:
¥500 = ごひゃくえん
¥1,200 = せんにひゃくえん
¥25,000 = にまんごせんえん
👥 Population & Statistics:
5,000 people = ごせんにん
30,000 people = さんまんにん
Year 2024 = にせんにじゅうよねん
🛍️ Shopping Conversation Example:
Customer: このコンピューターはいくらですか
Customer: How much is this computer?
Staff: はちまんえんです
Staff: It's 80,000 yen.
💡 Cultural Note:
In Japan, large purchases are often discussed in まん units. A car costing ¥2,000,000 is naturally called にひゃくまんえん (200まんえん), not "two million yen." This まん-based thinking is essential for natural conversation.
Practice Quiz
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Summary & What's Next
You've now learned the complete system for Japanese numbers up to 99,999! This foundation will serve you well in daily life, business, and academic contexts.
✅ What You've Mastered:
- • Complete hundreds system (100-900)
- • Complete thousands system (1,000-9,000)
- • Ten-thousands system (まん)
- • All major sound changes
- • Complex number construction
- • Real-world usage patterns
🎯 Study Tip:
Practice by reading prices, dates, and statistics in Japanese news or websites. The more you encounter these numbers in context, the more natural they'll become!
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