Japan Calculators & Converters
Free Japan-specific tools โ salary, tax, social insurance, traditional units, ceremonies, calendars, and postal utilities. All run in your browser.
From net salary and income tax to shakkanho unit conversion and wedding gift etiquette, this collection covers the full spectrum of Japan-specific calculations. Every tool runs entirely in your browser โ no data leaves your device.
๐ฐ Salary & Tax
Japan Net Salary Calculator
Calculate your Japanese net salary (tedori). Enter gross annual income to see take-home pay after income tax, resident t
Japan Income Tax Calculator
Estimate Japan's national income tax (ๆๅพ็จ) with progressive rates 5%-45%, the 480,000 basic deduction, and the reconstru
Japan Social Insurance Calculator
Calculate Japanese social insurance premiums (shakai hokenryo): health insurance, pension, employment insurance. See emp
Japan Withholding Tax Calculator
Estimate Japanese income tax withholding (ๆบๆณๅพดๅ) on salaries, bonuses and payments to freelancers. Monthly withholding am
Japan Resident Tax Calculator
Estimate Japanese municipal resident tax (ไฝๆฐ็จ) from last year's income. Income-based levy 10% plus a flat per-head amoun
Japan Consumption Tax Calculator
Japan consumption tax calculator (ๆถ่ฒป็จ). Add or remove 10% standard and 8% reduced tax on prices, or split a tax-included
Japan Year-End Tax Adjustment Calculator
Estimate your nenmatsu chosei (year-end tax adjustment) refund or additional tax. Compare withheld tax vs actual annual
Japan Annual Income Calculator
Calculate your total Japanese annual income from monthly salary, bonuses, overtime, and allowances. See gross annual and
Japan Overtime Calculator
Calculate Japanese overtime pay (zangyodai) with correct premium rates: 125% regular overtime, 150% over 60h/month, 150%
Japan Hourly Wage Calculator
Convert between hourly wage, daily pay, monthly salary, and annual income for Japan. Calculate jikyuki equivalents using
Japan Bonus Tax Calculator
Calculate Japanese bonus withholding tax (shoyo gensen choshuzei). Enter bonus amount and monthly salary to see tax usin
Japan Severance Pay Tax Calculator
Calculate income tax on Japanese severance pay (taishokukin). Uses the retirement income deduction (taishoku shotoku koj
Japan Hometown Tax Calculator
Calculate your Japan hometown tax (ใตใใใจ็ด็จ) deductible ceiling. Find the max donation with only 2,000 yen out of pocket b
Japan Inheritance Tax Calculator
Estimate Japanese inheritance tax (็ธ็ถ็จ) using the 30M + 6M-per-heir basic deduction and progressive 10%-55% rates. Enter
Japan Gift Tax Calculator
Estimate Japan's gift tax (่ดไธ็จ) on annual gifts over 1,100,000 yen. Progressive 10%-55% rates with the 2024 inheritance
Japan Corporate Tax Calculator
Estimate Japan's corporate tax (ๆณไบบ็จ) bill: 15% for small companies under 8M taxable income, 23.2% over, plus resident an
Japan Automobile Tax Calculator
Estimate Japan's annual automobile tax (่ชๅ่ป็จ) by engine size. 2026 prefectural rates for ordinary cars, kei cars and oth
Japan Light-Vehicle Tax Calculator
Estimate Japan's annual light-vehicle tax (่ปฝ่ชๅ่ป็จ): 10,800-yen private kei rate, April 2015 rate steps, the 13-year aged-
Japan Fixed Asset Tax Calculator
Estimate Japan's fixed asset tax (ๅบๅฎ่ณ็ฃ็จ) on land and buildings. Standard 1.4% rate on assessed value with the small-resi
Japan Stamp Duty Calculator
Find the Japanese revenue stamp duty (ๅฐ็ด็จ) on contracts and invoices. Tax table by document amount for sales contracts,
Japan Health Insurance Rate by Prefecture
Look up Japan Health Insurance Association (ๅไผใใใฝ) premium rates for all 47 prefectures and estimate your monthly premiu
Japan NHI Premium Calculator
Estimate your Japan National Health Insurance (NHI / ๅฝๆฐๅฅๅบทไฟ้บ) annual premium from household income and members. Uses repr
Japan Long-Term Care Insurance Calculator
Estimate Japan Long-Term Care Insurance (ไป่ญทไฟ้บ) premiums for ages 40+: income-based ๆๅพๅฒ plus flat ๅ็ญๅฒ, set per municipali
Japan Employment Insurance Calculator
Calculate Japan Employment Insurance (้็จไฟ้บ) premiums by business type โ general, agriculture/brewing, or construction โ
Japan National Pension Premium Calculator
Calculate Japan National Pension (ๅฝๆฐๅนด้) premiums: flat monthly rate ร contribution months, with student exemption and ่ฟฝ็ด
Japan Employees' Pension Premium Calculator
Calculate Japan Employees' Pension (ๅ็ๅนด้) insurance premiums from your standard monthly remuneration. 2026 rate 18.30%,
Japan Public Pension Estimator
Estimate your Japan public pension (ๅ ฌ็ๅนด้): flat National Pension base plus earnings-related Employees' Pension. Models c
Japan iDeCo / NISA Simulator
Simulate Japan private pension and savings (iDeCo / NISA / ใคใฟใใฆๆ่ณ): future value of monthly contributions with tax-free
๐ Dates & Calendar
Japan Era Converter
Convert any Japanese era year (ๅๆฆ) to a Western year and back: Meiji, Taisho, Showa, Heisei, Reiwa. Handles ๅ ๅนด and shows
Japan Gengo Lookup
Look up Japan's era names (ๅ ๅท): Meiji, Taisho, Showa, Heisei, Reiwa - their start/end dates, length, and classical meani
Japan Zodiac Calculator
Find the Japanese zodiac animal and ๅนฒๆฏ (eto) for any year: Rat, Ox, Tiger and the full 12-animal cycle, plus the 60-year
Japan Rokuyo Checker
Look up the Japanese ๅ ญๆ (rokuyล) for any date: ๅคงๅฎ, ่ตคๅฃ, ๅ ๅ, ๅๅผ, ๅ ่ฒ , ไปๆป . Based on the traditional lunisolar calendar. Hand
Japan Public Holiday Checker
List Japan's 16 public holidays (็ฅๆฅ) for any year, with dates, weekdays and substitute holidays. Handles Happy Monday an
Japanese Lunar Date Converter
Convert a Western date to the Japanese old lunar calendar (ๆงๆฆ) and see the moon age (ๆ้ฝข). Find the lunisolar month and d
Kazoedoshi Calculator
Calculate your kazoedoshi (ๆฐใๅนด), the traditional Japanese counting age. Enter your birth year to see both kazoedoshi and
Japan Yakudoshi Checker
Check your yakudoshi (ๅๅนด) - the traditional Japanese unlucky ages - from your birth year and gender. Shows ๅๅ, ๆฌๅ and ๅพๅ
Traditional Japanese Month Names
Learn all 12 traditional Japanese month names (ๅ้ขจๆๅ): Mutsuki, Kisaragi, Yayoi, Uzuki, Satsuki and more. See meanings, a
Setsubun & Eho Finder
Find the date of Setsubun (็ฏๅ) and the year's lucky direction (ๆตๆน, eho) for bean-throwing. Enter any year to see the eho
Auspicious Days Finder
Find auspicious days (ๅๆฅ) in the Japanese calendar: Ichiryumanbaibi (ไธ็ฒไธๅๆฅ) and Tenshabi (ๅคฉ่ตฆๆฅ). Check any date for the l
Furigana Generator
Add furigana readings above kanji in Japanese text. Free browser-based furigana generator using a common-word dictionary
Kanji Numerals Converter
Convert Arabic numbers to kanji numerals (ไธไบไธ) and formal banking numerals (ๅฃฑๅผๅ), and back again. Free browser-based Jap
Kanji Reading Lookup
Look up the onyomi and kunyomi readings of any common kanji. Free browser-based Japanese kanji reading finder with meani
Japanese Name Fortune
Try seimei handan (ๅงๅๅคๆญ), the Japanese name fortune telling by kanji stroke count. Free five-grid fortune calculator for
๐ Life Events & Ceremonies
Japan Wedding Gift Calculator
Find the right goshugi (wedding money gift) amount by relationship, attendance and couple status: parents, siblings, fri
Condolence Money Calculator
Find the right kouden (้ฆๅ ธ condolence money) amount for a Japanese funeral by relationship and age, plus hanbanshi (half-
Noshi Label Generator
Generate the correct noshi (ใฎใ) label text - omotegaki ่กจๆธใ - for any Japanese gift: ๅพก็ฅ, ๅพกไธญๅ , ๅพกๆญณๆฎ, ๅ ็ฅ, ๅพก้ๅ, ๅพกไปๅ and more.
Gift Envelope Kanji Converter
Convert any yen amount into old-style kanji (ๅคงๅญ) for Japanese gift envelopes: ้ๅฃฑ่ฌๅ, ้ๅ่ฌไผ้กๅ. Tamper-proof daiji with the
Senior Celebration Calculator
Find the Japanese longevity celebration (้ทๅฏฟ็ฅใ) for any age: ้ๆฆ60, ๅคๅธ70, ๅๅฏฟ77, ๅๅฏฟ80, ็ฑณๅฏฟ88, ๅๅฏฟ90, ็ฝๅฏฟ99, ็พๅฏฟ100. Names, colo
Kanreki Calculator
Find out when your kanreki (้ๆฆ, 60th birthday) year is. This traditional Japanese milestone celebrates completing the 60
Japan Shichi-Go-San Calculator
Work out the Shichi-Go-San (ไธไบไธ) ceremony year for a child from their birth year and gender. Boys at 3 & 5, girls at 3 &
Jusan Mairi Calculator
Find your Jusan Mairi (ๅไธๅใ) year. This Kyoto-rooted coming-of-age ritual celebrates children turning 13. Enter a birth
Coming of Age Calculator
Find your Seijin no Hi (Coming of Age Day) year. Enter your birth year to see when you celebrate turning 20 (or 18 since
New Year Card Address Formatter
Format a Japanese New Year card (ๅนด่ณ็ถ) address block: postal code, address, name, furigana and the correct honorific (ๆง,
Hanko Seal Generator
Find the right Japanese hanko (seal) type and size: ๅฎๅฐ jitsuin for registration, ้่กๅฐ ginkoin for banks, ่ชๅฐ ninin for dai
Japanese Name Generator
Generate realistic random Japanese full names with kana readings. Free online Japanese name generator for characters, ga
๐ Traditional Units (Shakkanho)
Shakkanho Unit Converter
Comprehensive shakkanho (traditional Japanese measurement) converter. Convert length, area, weight, and volume units all
Tsubo Area Converter
Convert tsubo (Japanese area unit) to square meters, square feet, acres, and hectares. 1 tsubo = 3.3058 m2 = 2 tatami ma
Bu Area Converter
Convert bu (Japanese area unit = 3.306 m2 = 1 tsubo) to square meters, square feet, tsubo, and tatami. Same as tsubo, us
Cho Area Converter
Convert cho (Japanese agricultural area unit = 9917 m2) to hectares, acres, m2, and tan. 1 cho = 10 tan = ~1 hectare. Fr
Ken Length Converter
Convert ken (Japanese architectural length unit = 1.818 m) to meters, feet, and shaku. 1 ken = 6 shaku. Used in traditio
Go Volume Converter
Convert go (Japanese volume unit for rice and sake) to milliliters, liters, cups, and fluid ounces. 1 go = 180 mL. Free
Koku Volume Converter
Convert koku (Japanese historical volume unit = 180 L) to liters, gallons, and other shakkanho units. 1 koku = 100 sho =
Kan Weight Converter
Convert kan (Japanese weight unit = 3.75 kg) to kilograms, pounds, grams, and momme. 1 kan = 1000 momme = 3.75 kg. Used
๐งญ Postal & Daily Utilities
Japan Postal Code Lookup
Validate a Japanese 7-digit postal code, auto-convert full-width digits, and identify the prefecture from the first two
Japan Postage Calculator
Calculate Japan Post rates (้ตไพฟๆ้) after the Oct 2024 revision: standard letters, non-standard mail, postcards, Letter Pa
Japan Prefecture Picker
Browse all 47 Japanese prefectures with JIS codes, kana, English names, capitals and regions. Search or filter by the 8
Japan Municipality Lookup
Decode a Japanese 5-digit municipality code (ๅธๅบ็บๆ): the first two digits are the prefecture. Covers ordinance-designated
Japan Address Formatter
Build a correct Japanese address: ใ postal code, prefecture, city, town, block, building, plus honorifics (ๆง/ๅพกไธญ). Vertic
Japan Onsen Lookup
Look up Japanese hot spring (onsen) spring qualities: the 10 legally defined types, temperature, pH and famous sources.
Japanese Rice & Water Calculator
Calculate the exact water needed for Japanese rice in a rice cooker: white, brown, no-rinse and mixed rice per gล (ๅ). C
Dashi Yield Calculator
Calculate how much kombu, katsuobushi, niboshi or dried shiitake you need for the dashi stock you want, by water volume.
Japan Salt Intake Calculator
Convert food-label sodium (Na, mg) into salt grams (Na x 2.54) and compare your daily total with the MHLW targets for me
Japanese Character Counter
Count Japanese characters, bytes (UTF-8 and Shift-JIS), and distinguish full-width from half-width. Free online Japanese
Hiragana to Katakana Converter
Convert hiragana to katakana and katakana to hiragana instantly in your browser. Free two-way Japanese kana converter wi
Japanese Surname Generator
Generate random common Japanese surnames (myลji) with readings. Free online Japanese surname generator for characters, g
Random Japanese Address Generator
Generate realistic fictional Japanese addresses for testing: random prefecture, city, town, block, postal code with a ma