この料率は2026-10-21時点のものです。最新の情報は各公式ページをご確認ください。

Writing Japanese dates, addresses and company names in English

Type a Western or Japanese-era date to get the US (October 21, 2026), UK (21 October 2026) and ISO 8601 (2026-10-21) forms. Type a Japanese postcode to get the prefecture, city and area in romaji from Japan Post's data, then add the block number and building to get the address in English order.

Everything runs in your browser. Only the postcode data for the first three digits is loaded from this site; the block number and building you type are never sent.

Month abbreviations take a period in US style; May is never abbreviated; September appears as both Sept. and Sep. UK style usually drops the period.

Company name (romaji, without the company type) Company type

English name examples

If the company already has an English name, use it. The registered trade name must contain 株式会社 or the like and cannot be registered as Co., Ltd. (Companies Act art. 6(2), Ministry of Justice). An English name is the company's own choice. 法務省

Job titles in English

Japanese	Common form	Alternatives

Phone number (domestic form)

From abroad, add +81 and drop the leading 0.

Amount (yen)

The yen has no decimal places. ¥ is also used for the Chinese yuan, so add JPY on documents for other countries.

On invoices, contracts and business cards

Invoices: spell out the month (October 21, 2026) or use ISO 8601 (2026-10-21) so the date cannot be misread. Add JPY to amounts.
Contracts: spell out the month and write the registered address in English order. Show the Japanese trade name next to the English name of each party.
Business cards: fit the address on two or three lines ending with JAPAN, keep one English form for each title, and write phone numbers as +81.

Questions

Should I use the US or UK date style?: Follow the reader's country. When you do not know it, spell out the month or use ISO 8601 (2026-10-21), which no one misreads.
How do I write 丁目 and 番地?: Join them with hyphens: 1丁目2番3号 becomes 1-2-3, placed before the area name, followed by the city, prefecture, postcode and JAPAN.
Is 株式会社 Co., Ltd. or Inc.?: Both are used and there is no rule. Follow the English name the company has chosen; the registered name stays the Japanese one with 株式会社.
Is 代表取締役 President?: The literal form is Representative Director. When the person is also the president, President and CEO is common. Use the same form on cards and contracts.

Address order from Japan Post; trade names from the Ministry of Justice (checked 2026-10-21). Date styles are conventions, not regulations.

Related tools and pages

Related tables and calculators (Japan by Numbers)

Japan by Numbers: free tables and calculators for working in Japan