Master Data
Browse and download the master datasets used for dummy data generation. Reuse the CSV files for your own testing or integrations.
japanese_prefectures
Prefectures
Prefecture master data including JIS codes and each notation (Japanese, Kana, English).
japanese_municipalities
Municipalities
Municipality master data including JIS codes and each notation (Japanese, Kana, English). Includes prefecture information.
japanese_person_last_names
Person Last Names
Common Japanese family names with kanji, katakana, and hiragana variants.
japanese_person_first_names
Person First Names
Common Japanese given names with kanji, katakana, and hiragana variants.
japanese_country_codes
Country Codes
Country codes defined by the Ministry of Justice (ISO 3166-1 alpha-2).
japanese_occupation_codes
Occupation Codes
Occupation classification codes based on the Japanese Standard Occupational Classification.
japanese_employee_types
Employee Types
Master data for common Japanese employee types (regular, contract, temporary, etc.).
currency_codes
Currency Codes
Currency codes defined by ISO 4217, including 3-letter alphabetic codes, numeric codes, currency names, and minor units.
language_codes
Language Codes
Language codes defined by ISO 639-1, including 2-letter alphabetic codes and language names (Japanese and English).
hobbies
Hobbies
Master data for common Japanese hobbies. Includes a wide range of categories such as sports, music, reading, games, and art.
company_names
Company Names
Master data for fictional Japanese company names. Includes corporations, limited companies, LLCs, and various legal entities.
product_names
Product Names
Master data for common Japanese product names. Includes a wide range of categories such as electronics, home appliances, fashion, food, and more.
vegetables_fruits
Vegetables & Fruits
Master data for common Japanese vegetables and fruits. Includes a wide range of categories such as leafy vegetables, root vegetables, and fruits.
store_names
Store Names
Master data for fictional Japanese store names. Includes a wide range of categories such as cafes, ramen, bakeries, restaurants, izakaya, and more.
blood_types
Blood Types
Master data for blood types based on ABO and Rh factor combinations. Includes distribution percentages for Japanese population.
departments
Departments
Master data for common department names used in Japanese companies. Includes categories such as management, administration, sales, engineering, and manufacturing.
job_titles
Job Titles
Master data for common job titles used in Japanese companies. Includes executives, CxO, management, specialists, and general staff.
http_status_codes
HTTP Status Codes
Master data for HTTP status codes defined in RFC 9110 and related RFCs. Includes 1xx through 5xx categories.
http_methods
HTTP Methods
Master data for HTTP request methods defined in RFC 9110. Includes safety and idempotency information.
mime_types
MIME Types
Master data for common MIME types (media types) used on the web. Includes file extension mappings.
programming_languages
Programming Languages
Master data for major programming languages. Includes file extensions, paradigms, and release years.
timezones
Timezones
Master data for major world timezones (IANA format). Includes UTC offsets and region information.
user_agents
User Agents
Master data for common browser and bot user agent strings. Includes browser name, version, and OS information.