Random Japan Address

What is the Random Japan Address Generator?

The Random Japan Address Generator is a free online random data tool built on public geographic information from all 47 prefectures of Japan. One click runs the Random Japan Address Generator once, and the prefecture, city/ward/town/village, chome-ban-go and postal code all follow the Japanese address format. The tool also provides Japanese name generation, My Number generation and credit card information generation, and can combine surname, given name, gender, date of birth, phone number, email, My Number, card number and other complete fields. It supports one-click switching among the six major regions — Kanto, Kansai, Chubu, Hokkaido & Tohoku, Chugoku & Shikoku, Kyushu & Okinawa — and a random prefecture.

As a lightweight Japan Address Generator, it solves the common pain points of manually inventing Japanese addresses: incorrect postal code formats, mismatches between prefecture and city/ward/town/village, and highly repetitive test data. It is suitable for front-end form integration, e-commerce checkout page demos, batch database filling, UI prototype design and API regression testing. All data is randomly generated locally in your browser, making it suitable for development integration, test filling, UI demos, data anonymization and script writing.

All data is generated by front-end algorithms in your browser and is not uploaded to any server, nor does it involve any real personal information. Therefore, the Random Japan Address Generator is not only a test data tool for developers, but also a convenient helper for designers, copywriters and content creators when they need Japanese placeholder information.

Which regions of Japan does the Random Japan Address Generator support generating addresses for?

The Random Japan Address Generator covers all 47 prefectures of Japan and can be quickly filtered by the six major regions, so you can target a Japan address at a specific business scenario:

Kanto Region: Japan's political and economic center, including Tokyo Metropolis, Kanagawa Prefecture, Chiba Prefecture, Saitama Prefecture, Ibaraki Prefecture, Tochigi Prefecture and Gunma Prefecture. Tokyo's phone area code is 03, Yokohama is 045 and Chiba is 043. It is Japan's most densely populated and commercial region.

Kansai Region: A major center of traditional Japanese culture, including Osaka Prefecture, Kyoto Prefecture, Hyogo Prefecture, Nara Prefecture, Shiga Prefecture and Wakayama Prefecture. Osaka's phone area code is 06, Kyoto is 075 and Kobe is 078, forming the Keihanshin metropolitan area.

Chubu Region: The heartland of Japanese manufacturing, including Aichi Prefecture, Shizuoka Prefecture, Nagano Prefecture, Gifu Prefecture, Niigata Prefecture, Toyama Prefecture and Ishikawa Prefecture. Nagoya's phone area code is 052 and Shizuoka is 054. It is home to the headquarters of major companies such as Toyota and Honda.

Hokkaido & Tohoku: The northern region of Japan, including Hokkaido, Miyagi Prefecture, Aomori Prefecture, Iwate Prefecture, Akita Prefecture, Yamagata Prefecture and Fukushima Prefecture. Sapporo's phone area code is 011 and Sendai is 022. It is nationally known for snow scenery, hot springs, agriculture and seafood.

Chugoku & Shikoku: Western Honshu and Shikoku Island, including Hiroshima Prefecture, Okayama Prefecture, Yamaguchi Prefecture, Tottori Prefecture, Shimane Prefecture, Tokushima Prefecture, Kagawa Prefecture, Ehime Prefecture and Kochi Prefecture. Hiroshima's phone area code is 082 and Takamatsu is 087. The Seto Inland Sea runs through the area.

Kyushu & Okinawa: The southwestern end of Japan, including Fukuoka Prefecture, Kumamoto Prefecture, Kagoshima Prefecture, Nagasaki Prefecture, Oita Prefecture, Miyazaki Prefecture, Saga Prefecture and Okinawa Prefecture. Fukuoka's phone area code is 092 and Naha is 098. Okinawa is known for its subtropical island scenery.

What fields does the Random Japan Address Generator support generating?

Each generation outputs a complete set of address and identity fields. Each field follows common format specifications and can remain geographically consistent with the selected prefecture and city/ward/town/village. Before introducing the specific fields, here are the rules and characteristics that Japanese addresses themselves follow, as these directly determine how each address field is generated:

① Hierarchical structure from largest to smallest: Japanese addresses are written in the order “prefecture → city/ward/town/village → chome → ban → go”, from the largest area to the smallest, so they are easy to split level by level and validate in linked form fields.

② Prefectures are 1 to, 1 do, 2 fu and 43 ken: namely Tokyo Metropolis, Hokkaido, Osaka Prefecture, Kyoto Prefecture and 43 prefectures, totaling 47 wide-area local public entities. The suffixes “to / do / fu / ken” cannot be mixed.

③ Block numbers are expressed numerically: Japanese streets do not use a road-name system such as “Main Street 12”. Instead, they use three-level numeric positioning of “chome-ban-go”, for example Marunouchi 1-2-3, read as “1-chome, 2-ban, 3-go”.

④ Postal codes are 7 digits: written as 〒XXX-XXXX, with the first 3 digits as the regional code and the last 4 digits as the subdivision code. The first 3 digits have a stable prefix correspondence with the prefecture, which can be used to look up the region.

⑤ Phone area codes are bound to regions: landline numbers start with an area code beginning with 0 to identify the region, such as 03 for Tokyo, 06 for Osaka and 075 for Kyoto. This tool matches the corresponding area code according to the selected prefecture.

Based on the above rules, the following list shows the specific generation method and validation rules for each field, so you can judge whether the field meets your validation requirements:

• Last Name / Surname 90% probability of kanji (such as 佐藤, 鈴木, 高橋), 10% probability of hiragana (such as さとう). Rule: randomly drawn from a common Japanese surname database; kanji and hiragana are distributed at 9:1 and are unrelated to the gender of the given name.
• First Name / Given Name 60% kanji (such as 太郎, 花子), 20% hiragana, 20% katakana, consistent with gender. Rule: male and female name databases are separate and drawn by gender; kanji : hiragana : katakana = 6:2:2.
• Gender Outputs Male / Female, consistent with the name database. Rule: gender is generated first, and the corresponding name database is then selected to ensure the name field is self-consistent.
• Phone Format 0X-XXXX-XXXX, 10 digits total, with the area code corresponding to the selected prefecture, such as 03-1234-5678 (Tokyo), 06-1234-5678 (Osaka). Rule: landline format; the area code is taken from the selected prefecture (such as 03 for Tokyo, 06 for Osaka and 075 for Kyoto), the remaining 8 digits are random, and mobile prefixes 090/080/070 are not used.
• Email Romanized name + random digits + common Japanese domains, such as [email protected], avoiding non-ASCII characters. Rule: lowercase romanized surname and given name + 1–3 random digits + common Japanese domains (yahoo.co.jp / gmail.com / docomo.ne.jp etc.), all ASCII, and can be used directly for email format validation.
• Street Address / Banchi Format is “chome + ban + go”, such as 1-2-3, Marunouchi 1-2-3. Rule: chome, ban and go are each 1–3 digits connected by hyphens; some blocks include a town name (such as Marunouchi) that matches the city/ward/town/village.
• City A city/ward/town/village matching the selected prefecture, such as Shibuya Ward, Chuo Ward, Kita Ward. Rule: drawn from the list of cities/wards/towns/villages under the selected prefecture; no cross-prefecture combinations.
• Prefecture Outputs the full Japanese name, such as Tokyo Metropolis, Osaka Prefecture, Hokkaido, Okinawa Prefecture. Rule: outputs the full Japanese name with the “to / do / fu / ken” suffix, consistent with the selected region or random result.
• Postal Code Japanese standard postal code format 〒XXX-XXXX, with the first 3 digits corresponding to the prefecture prefix, such as 〒100-0001. Rule: the first 3 digits are taken from the postal code prefix range corresponding to the prefecture, and the last 4 digits are random, ensuring strict postal-prefix ↔ prefecture correspondence.
• Full Address Complete concatenated format: 〒postal code + prefecture + city/ward/town/village + banchi, such as 〒100-0001 Tokyo Metropolis Chiyoda Ward Marunouchi 1-2-3. Rule: fixed order of “〒postal code + prefecture + city/ward/town/village + banchi”; component fields are consistent with the same record.
• Date of Birth Format MM/DD/YYYY, with age falling between 20 and 50, such as 07/18/1989. Rule: based on the current date minus 20–50 years; month and day follow the real calendar (including leap years and month lengths) to ensure a valid date.
• Occupation Common English occupation names, such as Software Engineer, Accountant, Designer. Rule: randomly drawn from a built-in English occupation name database, unrelated to gender or age.
• My Number 12 digits, format XXXX-XXXX-XXXX, with the last digit being the mod-11 weighted check digit, conforming to the rules of Japan's Ministry of Internal Affairs and Communications. Rule: the first 11 digits are random; the 12th digit is calculated by weighted summation and mod-11 according to the Ministry of Internal Affairs and Communications rules, and can be verified by the My Number validation algorithm.
• Card Number 16 digits (15 digits for American Express), conforming to the Luhn checksum algorithm, such as 4539 1488 0343 6467. Rule: generated according to the BIN prefix of the card type (Visa 4, MasterCard 51–55, Amex 34/37, Discover 6011/65); the last digit is the Luhn check digit and can pass front-end Luhn validation.
• Card Type Outputs Visa, MasterCard, American Express, or Discover. Rule: the four card types are equally likely and are consistent with the same record's BIN prefix, card number length and CVV length.
• Expiration Date Format MM/YY, a random date within the next 1–5 years, such as 08/29. Rule: the year is the current year +1 to +5, and the month is 01–12, ensuring a future valid date.
• CVV Security Code 3 digits; if the card type is American Express, 4 digits are output. Rule: determined by the card type in the same record — Amex is 4 digits, others are 3 digits, all pure digits.

How do you use the Random Japan Address Generator?

The core area of the page consists of a control panel and a results display, with a clear and intuitive workflow:

① Select Prefecture: At the top of the panel is a dropdown selector, with “🎲 Random Prefecture” selected by default. After clicking to expand, you can browse by the six major region tabs, or directly enter English, Japanese or Chinese keywords (such as “东京”, “Tokyo”, “とうきょう”) in the search box for cross-region search. Each row in the list shows the English name, Japanese name and prefecture code at once, so you can find a prefecture quickly.

② Generate Address: Click the “Generate” button, and the system builds a record from the public geographic information of the selected prefecture, and at the same time generates a Japanese name, phone, email, My Number and credit card information. The results are displayed in four sections: “Basic Information / Address Details / Identity Information / Credit Card Information”.

③ Copy / Export / Favorite: Click the “Copy” button to copy the current record at once in “Label: Value” format; click “Export” to save it as a CSV file; click “Favorite” to save the record locally in the browser. Click “Favorites” to switch to the favorites list view. Each record supports single-item copy and delete, and can also be exported to Excel in batch.

All favorites data is stored locally in the browser via localStorage and will remain after the page is closed, with nothing uploaded to any server.

Data Accuracy of the Random Japan Address Generator

The data output by this Random Japan Address Generator is simulated data with formats that conform to Japanese address specifications and content that is random and virtual. Prefecture names, city/ward/town/village names, postal code prefixes and phone area codes are all generated based on public geographic information, and the geographic correspondences and coding rules conform to Japanese address formats; names, dates of birth, My Numbers, credit card numbers, CVV and other fields are all generated by random algorithms. All data is randomly generated locally in your browser, suitable for development integration, test filling, UI demos, data anonymization and script writing.

Application Scenarios for the Random Japan Address Generator

• Front-End / Back-End Form Integration Quickly fill in forms such as Japanese shipping addresses and billing addresses, and check postal code formats, city-to-postal-code consistency and address validation logic.
• Cross-Border E-Commerce Checkout Demos Construct localized test addresses for Japanese sites, and test shipping calculation, logistics zoning, consumption tax display and other localized features.
• Database and Test Data Filling Save records in bulk and export them to Excel for loading into a test database, simulating the address distribution of Japanese users.
• UI Prototypes and Screenshot Demos Provide Japanese placeholder text with standard-compliant length and format for design drafts and demo videos, avoiding obvious fake data.
• API Automation Testing Continuously provide non-repeating Japanese address and identity parameters for API regression and stress testing, reducing the probability of data conflicts.
• Privacy Protection In unnecessary form-filling scenarios, replace real personal information with randomly generated results to avoid privacy leaks.

Precautions for Using the Random Japan Address Generator

When using the Random Japan Address Generator, please note the following points to ensure the tool is used correctly and compliantly:

• Generated results are fictional simulated data: although prefecture, city/ward/town/village, postal code prefix and phone area code are based on public geographic information, specific street numbers, names, birthdays and other combinations are random and not guaranteed to exist; they cannot be used as real addresses.
• Credit card information is for testing only: although card numbers pass the Luhn checksum algorithm, they are not real valid card numbers and cannot complete any real payment. Do not use them for real transactions or fraudulent purposes.
• My Number is a random simulated number: a real My Number is sensitive personal information protected by law. Do not associate generated results with any real identity information.
• Favorites data is stored only locally: favorite records are saved in browser localStorage and will be lost after clearing browser cache or changing devices. Please export important test data to Excel in time for backup.
• Do not use for illegal or infringing scenarios: this tool is intended for development integration, test filling, UI demos and data anonymization, and must not be used to forge identities, impersonate others' information or for other purposes that violate laws and regulations.